Lithium polymer battery—also known as the LiPo battery—is renowned for its high energy density, long charge cycle life, and long lifespan. Since 1998, they have been used in communication equipment, and now, they are the preferred choice across multiple industries in the market. As the professional lithium polymer battery supplier in China, VTCBATT is honored for providing safe, high-performance, customizable LiPo batteries. Whether you are a consumer battery products supplier, a commercial electronic equipment supplier, or even a car, airplane manufacturer, we can provide the optimal power solution for your products. Whether you are a consumer battery products supplier, a commercial electronic equipment supplier, or even a car or airplane manufacturer, we can provide a custom lithium battery solution tailored to your product requirements.
Our lithium polymer batteries have up to 1000 charge discharge cycles and can be customized with capacities ranging from 10-20000mAh (and more). No matter whether you want a small lithium polymer battery or big lipo battery, VTCBATT can customize exactly for you. Furthermore, all the lithium polymer batteries are equipped with Seiko IC and MOS protection settings, and some models can be designed with PCB to ensure stable and safe operation in any application and environment. VTCBATT LiPo batteries also passed the series strict quality and safety tests and have CE, CB, IEC,UN38.3 ISO, UL and other certifications, making them a worthy choice. We support OEM and ODM services. Contact us now to customize the best battery solution for your product!
Choose custom lithium polymer batteries by thickness, from ultra-thin 0.8mm to 2.0mm pouch cells for compact electronics to thicker 5.0mm, 8.0mm, 10mm+ LiPo batteries for higher capacity and longer runtime.
Applications: Long-runtime devices, industrial electronics, medical equipment
Description: Thicker high-capacity LiPo batteries for products requiring longer working time and higher energy storage.
Small to high-capacity lithium polymer batteries for devices requiring different runtime and power needs.
3.7V single-cell and 7.4V / 11.1V multi-cell LiPo battery packs for different electronic systems.
Voltage: 3.7V nominal / 4.2V full charge
Applications: Wearables, sensors, Bluetooth devices, handheld electronics
Single-cell lithium polymer batteries for compact electronics that require a simple charging circuit and customized size.
Voltage: 7.4V nominal / 8.4V full charge
Applications: Medical devices, POS terminals, portable instruments, small robots
2S LiPo battery packs with PCM or BMS protection, customized wire length, connector, and pack layout.
Voltage: 11.1V nominal / 12.6V full charge
Applications: Industrial electronics, robotics, test equipment, portable systems
3S lithium polymer battery packs for equipment requiring higher voltage, stable output, and integrated protection.
Voltage: Custom series configuration
Applications: Drones, robotics, industrial devices, special power systems
Custom multi-cell LiPo packs can be designed by series count, capacity, discharge current, BMS, connector, and charger requirements.
Low-temperature and high-temperature LiPo batteries for outdoor devices, cold-chain equipment, tracking systems, and industrial applications. VTCBATT can customize lithium polymer batteries by operating temperature, charging protection, thermal design, connector, enclosure, and application environment.
Temperature range: Discharge from -20°C to 75°C; charge from 0°C to 60°C depending on cell specification and thermal design.
Applications: Industrial controllers, smart meters, solar monitoring systems, vehicle telematics, GPS trackers, outdoor security devices, environmental sensors, and sealed electronic equipment used in the Middle East, Southeast Asia, India, and other high-temperature environments.
Description: For high-temperature use, engineers review cell chemistry, current load, enclosure material, BMS limits, heat dissipation, and actual battery enclosure temperature.
Temperature range: Discharge from -20°C to 60°C; charge from 0°C to 45°C, or with low-temperature charging protection depending on cell specification.
Applications: Cold-chain devices, GPS trackers, outdoor sensors, winter electronics, and devices used in Canada, Northern Europe, Russia, and other cold regions.
Description: Low-temperature LiPo batteries are designed for devices that must discharge in cold environments. Charging below 0°C may require low-temperature charging cutoff, heating elements, NTC sensing, or BMS-controlled heating logic.
Temperature range: Discharge from -40°C to 85°C; charge from -20°C to 60°C depending on cell specification and pack design.
Charging and discharging: Low-temperature charging may require reduced current, NTC sensing, BMS cutoff, or heating. Discharge should be checked by load current, pulse current, cutoff voltage, and temperature rise.
Description: For applications beyond the typical LiPo temperature range, VTCBATT can help evaluate rechargeable wide-temperature Li-ion battery options based on temperature, charging, load, and installation conditions.
Topic: Low-temperature charging, high-temperature operation, wide-temperature cell chemistry, BMS protection, and environmental testing
Applications: Cold-chain devices, GPS trackers, smart meters, outdoor sensors, security systems, vehicle telematics, solar monitoring systems, and industrial IoT used in cold regions such as Canada, Northern Europe, and Russia, as well as high-temperature regions such as the Middle East, Southeast Asia, and India.
Description: Learn how extreme cold, high heat, temperature cycling, outdoor exposure, and BMS protection affect lithium battery performance, safety, cycle life, and long-term reliability in harsh environments.
Standard-rate and high-rate LiPo batteries for devices requiring stable current output, pulse discharge, or higher power performance.
Discharge rate: 0.2C to 2C continuous discharge; up to 3C pulse discharge depending on cell model.
Applications: Wearables, sensors, Bluetooth devices, POS terminals, handheld electronics, and devices with stable current demand.
Description: Standard-rate LiPo batteries are suitable for compact devices that need stable output, normal runtime, and reliable daily operation.
Discharge rate: 10C to 40C continuous discharge, including 33C high-drain LiPo options depending on cell model.
Applications: Power tools, robotics, medical equipment, portable instruments, and high-load electronics.
Description: High-drain LiPo batteries are designed for devices requiring stronger continuous discharge performance, lower internal resistance, and higher current output.
Discharge rate: Up to 180C burst discharge depending on cell model, pulse duration, and thermal design.
Applications: Drones, RC models, jump starters, emergency devices, and pulse-power systems.
Description: Ultra-high-rate LiPo batteries support short-duration high output when the cell, tabs, wiring, connector, and thermal design are properly matched.
Discharge rate: Customized by continuous current, peak current, pulse duration, duty cycle, cutoff voltage, and temperature rise.
Applications: Tracking devices, wireless transmitters, motors, pumps, actuators, and special equipment with defined pulse-load profiles.
Description: Custom pulse discharge LiPo batteries are designed according to the actual load profile, including current demand, pulse duration, idle time, voltage drop, temperature rise, and PCM/BMS protection.
Different applications require different lithium polymer battery designs. Automotive electronics usually focus on temperature resistance, backup power reliability, vibration tolerance, and long service life, while IoT, wearable, and medical devices often require compact size, stable standby performance, safe charging, and customized connectors or protection circuits.
Typical needs: Temperature resistance, vibration tolerance, low self-discharge, backup power reliability, and long service life.
For GPS trackers, T-BOX telematics, eCall backup systems, TPMS, ETC on-board units, smart keys, dash cameras, outdoor sensors, and other vehicle electronics operating in demanding environments.
Depending on the application, VTCBATT may recommend LiPo, Li-ion, Li-SOCl2, Li-MnO2, or hybrid battery solutions for automotive electronics.
Typical needs: Compact size, stable standby performance, low self-discharge, wide operating environment, and pulse current support.
For GPS trackers, asset tracking devices, wireless sensors, smart meters, security devices, remote monitoring equipment, Bluetooth devices, and industrial IoT products.
VTCBATT can help evaluate LiPo, Li-ion, Li-SOCl2, or Li-MnO2 battery options depending on standby time, pulse current, communication interval, temperature range, and installation space.
Typical needs: Thin cells, low weight, custom dimensions, flexible pack structure, and stable daily runtime.
For smartwatches, medical patches, smart rings, fitness trackers, health monitors, wearable sensors, and compact consumer electronics requiring lightweight, shape-flexible lithium polymer batteries.
VTCBATT can customize LiPo battery thickness, width, length, connector, wire outlet, PCM protection, NTC, and packaging according to the wearable product design.
Typical needs: Reliable output, compact structure, safety protection, stable charging, and consistent batch quality.
For portable medical devices, diagnostic tools, monitoring equipment, rehabilitation devices, medical patches, infusion pumps, and healthcare electronics requiring safe and stable battery performance.
VTCBATT can customize LiPo battery packs with suitable cell selection, PCM/BMS protection, connector, NTC, enclosure, labeling, and testing requirements for medical device applications.
| Model | Voltage | Capacity | Certification | Other Certifications | Size |
|---|---|---|---|---|---|
| 022817 | 3.7V | 45mAh | / | UN38.3 | 2*28*19 |
| 102040 | 3.7V | 750mAh | KC | 10*20*42 | |
| 102050 | 3.7V | 1000mAh | KC | CB/PSE/UL/UN38.3/RoHS/CE | 10*20*52 |
| 102055 | 3.7V | 1100mAh | KC | UL1642 | 10*20*57 |
| 102525 | 3.7V | 500mAh | / | CQC | 10*25*27 |
| 103040 | 3.7V | 1200mAh | KC | UL1642/CE/UN38.3 | 10*30*42 |
| 103048 | 3.7V | 1400mAh | KC | RoHS/UN38.3/CE | 10*30*50 |
| 103450 | 3.7V | 1800mAh | KC | UL/UN38.3/PSE/RoHS/UL1642/CB | 10*34*52 |
| 104050 | 3.7V | 2300mAh | KC | UN38.3/RoHS | 10*40*52 |
| 104060 | 3.7V | 2800mAh | KC | 10*40*62 | |
| 104065 | 3.7V | 3200mAh | KC | 10*40*67 | |
| 105050 | 3.7V | 3000mAh | KC | UL1642/UN38.3 | 10*50*52 |
| 105060 | 3.7V | 3500mAh | KC | 10*50*62 | |
| 105065 | 3.7V | 4000mAh | KC | 10*50*67 | |
| 105080 | 3.7V | 5000mAh | / | UL1642 | 10*50*80 |
| 105085 | 3.7V | 5000mAh | KC | UL/CB/UN38.3 | 10*50*87 |
| 105573 | 3.7V | 5000mAh | KC | 10*55*75 | |
| 124040 | 3.7V | 2000mAh | KC | EN62133 | 12*40*42 |
| 124060 | 3.7V | 3600mAh | KC | 12*40*62 | |
| 126090 | 3.7V | 8000mAh | / | CE | 12*60*92 |
| 131827 | 3.7V | 500mAh | / | UN38.3 | 13*18*29 |
| 132682 | 7.4V | 1500mAh | / | UN38.3 | 13*26*84 |
| 136198 | 3.7V | 8000mAh | / | CE | 13*61*100 |
| 285272 | 3.7V | 1000mAh | / | UL1642 | 3*52*74 |
| 301120 | 3.7V | 40mAh | / | UL1642 | 3*11*20 |
| 301525 | 3.7V | 80mAh | KC | 3*15*27 | |
| 302020 | 3.7V | 80mAh | / | UN38.3 | 3*20*22 |
| 303040 | 3.7V | 320mAh | KC | 3*30*42 | |
| 303055 | 3.7V | 500mAh | KC | UN38.3 | 3*30*57 |
| 303997 | 3.7V | 1500mAh | / | UN38.3 | 3*39*99 |
| 401120 | 3.7V | 55mAh | KC | 4*11*22 | |
| 401042 | 3.7V | 100mAh | KC | 4*10*44 | |
| 401230 | 3.7V | 110mAh | KC | 4*12*32 | |
| 401235 | 3.7V | 120mAh | KC | 4*12*37 | |
| 401430 | 3.7V | 120mAh | KC | 4*14*32 | |
| 401430 | 3.7V | 130mAh | KC | 4*14*32 | |
| 402065 | 3.7V | 550mAh | KC | 4*20*67 | |
| 402535 | 3.7V | 300mAh | / | UN38.3 | 4*25*37 |
| 402780 | 3.7V | 1000mAh | KC | UL1642/RoHS/UN38.3 | 4*27*82 |
| 402895 | 3.7V | 1200mAh | KC | 4*28*97 | |
| 402934 | 3.7V | 350mAh | KC | UN38.3/WERCSmart | 4*29*36 |
| 403274 | 3.7V | 1000mAh | / | UL1642 | 4*32*74 |
| 405085 | 3.7V | 2000mAh | / | UL1642 | 4*50*87 |
| 443441 | 3.7V | 650mAh | KC | 4.4*34*43 | |
| 452536 | 3.7V | 400mAh | / | UN38.3 | 4.5*25*38 |
| 501318 | 3.7V | 55mAh | / | UL1642/UN38.3 | 5*13*20 |
| 501447 | 3.7V | 280mAh | KC | 5*14*49 | |
| 501535 | 3.7V | 200mAh | KC | 5*15*37 | |
| 501535 | 3.7V | 220mAh | / | UN38.3 | 5*15*37 |
| 502025 | 3.7V | 200mAh | KC | 5*20*27 | |
| 502030 | 3.7V | 250mAh | KC | UN38.3/CE | 5*20*32 |
| 502035 | 3.7V | 300mAh | KC | UN38.3 | 5*20*37 |
| 502065 | 3.7V | 700mAh | KC | 5*20*67 | |
| 502248 | 3.7V | 500mAh | KC | 5*22*50 | |
| 502530 | 3.7V | 350mAh | KC | 5*25*32 | |
| 502535 | 3.7V | 400mAh | KC | 5*25*37 | |
| 502545 | 3.7V | 600mAh | KC | 5*25*47 | |
| 502728 | 3.7V | 360mAh | KC | 5*27*30 | |
| 503035 | 3.7V | 500mAh | KC | 5*30*37 | |
| 503040 | 3.7V | 600mAh | KC | UN38.3 | 5*30*42 |
| 503048 | 3.7V | 750mAh | KC | CB/UN38.3 | 5*30*50 |
| 503070 | 3.7V | 1400mAh | / | UN38.3 | 5*30*72 |
| 503670 | 3.7V | 1500mAh | / | UL1642 | 5*36*70 |
| 503759 | 3.7V | 1200mAh | KC | UL1642/UN38.3/CE/IEC62133 | 5*37*61 |
| 504040 | 3.7V | 800mAh | KC | 5*40*42 | |
| 505050 | 3.7V | 1500mAh | KC | 5*50*52 | |
| 505573 | 3.7V | 2500mAh | KC | 5*55*75 | |
| 506090 | 3.7V | 3000mAh | KC | UL1642 | 5*60*92 |
| 523450 | 3.7V | 1000mAh | KC | UN38.3/RoHS/UL1642 | 5.2*34*52 |
| 551525 | 3.7V | 170mAh | / | UN38.3 | 5.5*15*27 |
| 551656 | 3.7V | 480mAh | / | UL1642 | 5.5*16*58 |
| 552045 | 3.7V | 450mAh | KC | 5.5*20*47 | |
| 601235 | 3.7V | 180mAh | / | UN38.3 | 6*12*37 |
| 601248 | 3.7V | 250mAh | / | UN38.3 | 6*12*50 |
| 601535 | 3.7V | 250mAh | KC | 6*15*37 | |
| 601720 | 3.7V | 150mAh | KC | 6*17*22 | |
| 601730 | 3.7V | 250mAh | / | UN38.3 | 6*17*32 |
| 602030 | 3.7V | 300mAh | KC | UL/UN38.3/Prop 65/CE/EN62133/IEC62133 | 6*20*32 |
| 602035 | 3.7V | 400mAh | KC | UL1642 | 6*20*37 |
| 602040 | 3.7V | 400mAh | KC | 6*20*42 | |
| 602040 | 3.7V | 450mAh | KC | 6*20*42 | |
| 602047 | 3.7V | 540mAh | KC | 6*20*49 | |
| 602530 | 3.7V | 450mAh | KC | 6*25*32 | |
| 602535 | 3.7V | 500mAh | KC | IEC62133/UN38.3 | 6*25*37 |
| 603030 | 3.7V | 500mAh | KC | 6*30*32 | |
| 603040 | 3.7V | 680mAh | KC | UL1642 | 6*30*42 |
| 603048 | 3.7V | 900mAh | KC | UL1642 | 6*30*50 |
| 603759 | 3.7V | 1400mAh | / | UN38.3/IEC62133 | 6*37*61 |
| 604050 | 3.7V | 1500mAh | KC | UN38.3 | 6*40*52 |
| 604060 | 3.7V | 1700mAh | KC | UL1642 | 6*40*62 |
| 604070 | 3.7V | 2000mAh | KC | 6*40*72 | |
| 605060 | 3.7V | 2000mAh | KC | 6*50*62 | |
| 605070 | 3.7V | 2300mAh | / | UN38.3 | 6*50*72 |
| 605080 | 3.7V | 3000mAh | KC | UL/CB/IEC62133/UN38.3 | 6*50*82 |
| 606090 | 3.7V | 4000mAh | KC | UL1642 | 6*60*92 |
| 634169 | 3.7V | 2000mAh | KC | UN38.3 | 6.3*41*71 |
| 641447 | 3.7V | 400mAh | KC | 6.4*14*49 | |
| 651476 | 3.7V | 900mAh | / | UN38.3 | 6.5*14*78 |
| 651725 | 3.7V | 230mAh | KC | 6.5*17*27 | |
| 652540 | 3.7V | 650mAh | / | UL1642 | 6.5*25*40 |
| 653040 | 3.7V | 800mAh | KC | 6.5*30*42 | |
| 654060 | 3.7V | 1700mAh | / | UL1642 | 6.5*40*60 |
| 654065 | 3.7V | 2000mAh | KC | UL1642/PSE/UN38.3 | 6.5*40*67 |
| 686770 | 3.7V | 4000mAh | KC | 6.8*67*72 | |
| 701330 | 3.7V | 200mAh | KC | RoHS/CE/CB/UN38.3 | 7*13*30 |
| 701435 | 3.7V | 300mAh | / | UN38.3 | 7*14*37 |
| 701488 | 3.7V | 850mAh | KC | 7*14*90 | |
| 701525 | 3.7V | 200mAh | / | UL1642 | 7*15*25 |
| 701535 | 3.7V | 350mAh | KC | UL1642/CE/RoHS/UN38.3/IEC62133 | 7*15*37 |
| 702025 | 3.7V | 300mAh | KC | CE/Prop65/UN38.3/EN62133 | 7*20*27 |
| 702050 | 3.7V | 800mAh | / | UN38.3 | 7*20*52 |
| 702060 | 3.7V | 850mAh | KC | CE/UN38.3 | 7*20*62 |
| 702248 | 3.7V | 800mAh | KC | 7*22*50 | |
| 702257 | 3.7V | 1000mAh | KC | 7*22*59 | |
| 703048 | 3.7V | 1000mAh | KC | UL1642/UN38.3 | 7*30*50 |
| 703440 | 3.7V | 1000mAh | KC | UN38.3 | 7*34*42 |
| 706090 | 3.7V | 5000mAh | KC | 7*60*92 | |
| 721944 | 3.7V | 630mAh | KC | 7.2*19*46 | |
| 751635 | 3.7V | 380mAh | KC | 7.5*16*37 | |
| 752035 | 3.7V | 500mAh | KC | 7.5*20*37 | |
| 753450 | 3.7V | 1300mAh | KC | 7.5*34*52 | |
| 756077 | 3.7V | 4800mAh | KC | CB/UN38.3 | 7.5*60*77 |
| 782150 | 3.7V | 800mAh | KC | 7.8*21*52 | |
| 801350 | 3.7V | 500mAh | KC | 8*13*52 | |
| 801735 | 3.7V | 500mAh | KC | UN38.3 | 8*17*37 |
| 802030 | 3.7V | 400mAh | KC | UL1642/PSE/UN38.3 | 8*20*32 |
| 802035 | 3.7V | 500mAh | KC | 8*20*37 | |
| 802040 | 3.7V | 600mAh | KC | UL1642 | 8*20*42 |
| 802050 | 3.7V | 800mAh | KC | UL1642/CB/UN38.3/CE | 8*20*52 |
| 802248 | 3.7V | 1000mAh | KC | 8*22*50 | |
| 802528 | 3.7V | 480mAh | KC | UL/UN38.3/CE/IEC62133 | 8*25*30 |
| 802530 | 3.7V | 600mAh | KC | UL1642 | 8*25*32 |
| 803035 | 3.7V | 800mAh | KC | UN38.3 | 8*30*37 |
| 803040 | 3.7V | 900mAh | KC | 8*30*42 | |
| 803048 | 3.7V | 1200mAh | KC | UL1642 | 8*30*50 |
| 803448 | 3.7V | 1300mAh | KC | 8*34*50 | |
| 803450 | 3.7V | 1500mAh | KC | UL/CB/IEC62133/RoHS/BSMI/CE/UN38.3 | 8*34*52 |
| 804050 | 3.7V | 1800mAh | KC | 8*40*50 | |
| 804050 | 3.7V | 2000mAh | / | UL1642 | 8*40*52 |
| 804068 | 3.7V | 2500mAh | KC | UL1642 | 8*40*70 |
| 805080 | 3.7V | 4000mAh | KC | 8*50*80 | |
| 805185 | 3.7V | 4000mAh | / | UN38.3 | 8*51*87 |
| 832248 | 3.7V | 920mAh | KC | UL1642/UN38.3 | 8.3*22*50 |
| 851768 | 3.7V | 850mAh | KC | 8.5*17*69 | |
| 852025 | 3.7V | 350mAh | / | UL1642 | 8.5*20*25 |
| 901744 | 3.7V | 680mAh | KC | 9*17*46 | |
| 902030 | 3.7V | 500mAh | KC | UL1642/UN38.3/CE | 9*20*32 |
| 902035 | 3.7V | 600mAh | KC | UN38.3 | 9*20*37 |
| 902128 | 3.7V | 500mAh | / | UN38.3 | 9*21*30 |
| 902248 | 3.7V | 1050mAh | / | UN38.3/CE | 9*22*50 |
| 902535 | 3.7V | 800mAh | KC | UL1642 | 9*25*37 |
| 903450 | 3.7V | 1600mAh | KC | 9*34*52 | |
| 951768 | 3.7V | 1200mAh | KC | 9.5*17*69 | |
| 955050 | 3.7V | 2800mAh | / | PSE/UN38.3 | 9.5*50*52 |
| 955565 | 3.7V | 5000mAh | KC | 9.5*55*67 | |
| 14430 | 3.7V | 650mAh | / | UN38.3 | / |
| 18650 | 3.7V | 2600mAh | / | RoHS | / |
| 134065 | 3.7V | 4000mAh | / | UN38.3 | 13*40*68 |
| 1162105 | 3.7V | 10000mAh | / | UN38.3 | 11*62*107 |
| 3060100 | 3.7V | 2000mAh | KC | 3*60*100 | |
| 103030-2P | 3.7V | 2000mAh | / | IEC62133/UN38.3 | 21*31*32 |
| 162027-2P | 3.7V | 700mAh | KC | CB/UN38.3/RoHS | 16*20*27 |
| 503759-2P | 3.7V | 2400mAh | / | CB | 11*37*62 |
| 603450-2P | 3.7V | 2400mAh | / | UN38.3 | 12*34*52 |
| 502025-4P | 3.7V | 800mAh | KC | CB | 21*20*27 |
| 414256-2S | 7.4V | 5500mAh | / | UN38.3 | 41*42*58 |
| 604040-2S | 7.4V | 1000mAh | KC | CB/IEC62133/UN38.3/ | 13*40*43 |
| 804262-2S | 7.4V | 2500mAh | / | UN38.3 | 16*42*64 |
| 102050-2S | 7.4V | 1000mAh | KC | 20*20*53 | |
| 124060-2S | 7.4V | 1700mAh | KC | CB/UN38.3 | 12*40*63 |
| 4030100-2S | 7.4V | 1400mAh | / | UN38.3 | 8*30*102 |
| 603048-3S | 11.1V | 900mAh | / | EN62133 | 19*30*50 |
| 603450-3S | 11.1V | 1200mAh | / | UN38.3 | 19*34*52 |
| 285272-5S | 18.5V | 1000mAh | / | UL1642/IEC62133/CE/UN38.3 | / |
| 403274-6S | 22.2V | 1000mAh | / | UN38.3/CQC | 31*33*78 |
| 18650-30Q-2P | 3.7V | 6000mAh | / | CB | / |
| 18650-2S | 7.4V | 2000mAh | / | UN38.3 | / |
| 18650-2S2P | 7.4V | 5200mAh | KC | CB | / |
| 18650-3S | 11.1V | 2550mAh | / | UN38.3 | / |
| 192560 | 3.2V | 1800mAh | / | UN38.3 | 19*25*62 |
| 143060 | 3.2V | 1800mAh | / | UN38.3 | 14*30*62 |
| 503035 | 3.2V | 300mAh | / | RoHS | 5*30*35 |
01 Production material issueMaterial requisition and stock keeper confirmation. Material | → | 02 Welding leadSoldering iron temperature and anti-static wrist strap control. Critical Process | → | 03 Soldering PCBsSpot welder specification and electrostatic ring control. Critical Process | → | 04 Coated paperAdhesive tape positioning and affixing inspection. Process | |||
05 Film blowingPVC heat-shrink appearance and exposed-end control. Process | → | 06 LabelingLabel centering, air bubble, content and clarity inspection. Process | → | 07 Battery size checkThickness, width and length inspection by caliper. Inspection | → | 08 Visual inspectionScratches, dents, damage, swelling and leakage check. Inspection | |||
09 Functional testingVoltage, resistance, NTC, charge/discharge and protection test. Critical Process | → | 10 Pack in blister pack16 pieces per tray with quantity confirmation. Packing | → | 11 Packing96 pieces per box with quantity confirmation. Packing | → | 12 OQC inspectionAppearance, performance, quantity and sampling inspection. Inspection | |||
13 Put into stockFinished goods receiving by warehouse. Warehouse | |||||||||
| No. | Project Name | Work Instruction | Equipment | Equipment Control Parameters | Product Control Item | Control Standard | Measuring Instrument / Method | QC Inspection | Production Inspection | Record Form |
|---|---|---|---|---|---|---|---|---|---|---|
| 01 | Production material issue | Production Management Procedures | Trolley | / | / | / | / | / | Stock taker | Material Requisition Form |
| 02 | Welding lead | Wire Welding Work Instructions | Soldering iron; anti-static wrist strap | 1. Soldering iron temperature: 380-410 °C 2. Anti-static wrist strap in good condition | Good soldering | 1. Weld is in the correct position 2. No cold welds or incomplete welds | Thermometer | Product spot checks: 20 items per 2 hours | Operator self-check | Workshop Initial Self-Inspection Record Form Soldering Iron Temperature Check Record |
| 03 | Soldering PCBs | Work Instruction for Battery Cell Lidding | Spot welder; electrostatic ring | 1. Spot welder specifications 2. Static ring in good condition | Good soldering | 1. Weld is in the correct position 2. No cold welds or incomplete welds | Thermometer | Product spot checks: 20 items per 2 hours | Operator self-check | Soldering Iron Temperature Test Record |
| 04 | Coated paper | Work Instructions for Coating and Wrapping with Adhesive Tape | Adhesive tape machine | / | Appearance | 1. Correctly positioned 2. Securely affixed | Visual | / | Operator self-check | / |
| 05 | Film blowing | Film Blowing Work Instructions | Heat-shrink packaging machine; PVC film | 1. Reflow temperature 2. Reflow time | Appearance | PVC must not be creased, damaged or have exposed ends | Visual | / | 100% inspection | / |
| 06 | Labeling | Labeling Work Instructions | Labeling fixture; label application | Labels centered, with no air bubbles | Appearance | 1. Labels are correctly positioned 2. Label content is clear and accurate | Visual | Product spot checks: 20 items per 2 hours | 100% inspection | Soldering Iron Temperature Test Record |
| 07 | Battery size check | Battery Dimensions Inspection Work Instruction | Caliper | 1. Thickness 2. Width 3. Length | Size | 1. Battery dimensions comply with process requirements 2. Printed text is clear and accurate | Caliper | Product spot checks: 20 items per 2 hours | Initial inspection, self-inspection | Workshop Initial Self-Inspection Record IPQC Patrol Inspection Record |
| 08 | Visual inspection of finished products | Visual Inspection Standards for Polymer Cell (Battery) | / | / | Appearance | Battery is in good condition, with no scratches, dents, damage, swelling or leakage | Visual | Product spot checks: 20 items per 2 hours | 100% inspection | IPQC Inspection Record Form |
| 09 | Functional testing of finished products | Work Instructions for Finished Product Testing | Battery test set | 1. Voltage: > 3.85 V, internal resistance: approx. 150 mΩ, overcurrent: 6-9 A 2. Short circuit: OK | Battery functions | 1. Voltage: 3.9-4.0 V; internal resistance approx. 265 mΩ 2. NTC: 8-11 kΩ 3. Charge/discharge and short-circuit protection functioning correctly | Battery test set | Product spot checks: 20 items per 2 hours | 100% inspection during production; first-piece inspection | Workshop Initial Self-Inspection Record IPQC Patrol Inspection Record |
| 10 | Pack in a blister pack | Packing Instructions | / | 16 pieces per tray | Quantity | Quantities are accurate; no over-packing or under-packing | Visual | / | Operator self-check | / |
| 11 | Packing | Packing Instructions | / | 96 pieces per box | Quantity | Quantities are accurate; no over-packing or under-packing | Visual | / | Operator self-check | / |
| 12 | OQC inspection | OQC Inspection Operating Standards | Visual; comprehensive tester; caliper | 1. Voltage: > 3.85 V, internal resistance: approx. 150 mΩ, overcurrent: 6-9 A 2. Short circuit: OK | Appearance and performance; quantity | 1. Quantities are accurate, with no over-packing or under-packing 2. Appearance meets customer requirements 3. Functionality is sound and meets customer requirements | Visual; universal tester; caliper | GBT 2828.1-2012 | OQC sampling inspection | |
| 13 | Put into stock | Procedure for Incoming and Outgoing Goods Inspection | / | / | Quantity and specifications | Quantities are accurate; no over-packing or under-packing | Visual | / | Warehouse receiving | Finished Goods Receipt |
This calculator provides an estimated capacity for custom lithium polymer pouch batteries based on the available battery dimensions (thickness, width, and length).
LiPo battery voltage and usable capacity vary with operating temperature and discharge load. The curves below illustrate cell performance measured under controlled laboratory conditions.
Evaluates cell discharge from -20°C to 60°C. Sub-zero temperatures increase internal impedance, causing greater voltage drop and earlier 3.0V cutoff.
Test Profile: VTC-LP102040 3.7V 750mAh; CC-CV charge (4.2V, 375mA, 50mA cutoff); 0.5C (375mA) discharge to 3.0V; ambient temperatures: -20°C to 60°C.
Higher continuous currents cause greater voltage drop, reducing delivered capacity before the 3.0V cutoff.
Conditions: Model VTC-LP102040 (3.7V / 750mAh); ambient: 25°C; cutoff: 3.0V; rates: 1C, 1.5C, 2C, 2.5C, 3C.
Engineering Note: Test data is for reference only. VTCBATT provides custom LiPo cell and pack solutions tailored to your target load, operating temperature, and runtime requirements.
VTCBATT can customize JST, Molex, wire length, wire gauge, NTC, PCM/BMS, tab position, and connector direction according to your device structure.
Request Connector CustomizationThe automatic tape machine can detect LiPo battery size and cut tape to correct size automatically. The manipulator will wrape the lithium polymer battery automatically and align neatly.
This process can prevent lipo battery swelling, misalignment,external,short circuits and mechanical vibration damage
It can improve higher efficiency and consistency, reduce labor cost improvement and package the battery safely.
Custom Lithium Polymer Battery Design Guide
Learn how engineers design custom lithium polymer battery packs by voltage, capacity, dimensions, PCM/BMS protection, connector, temperature, and application requirements.
LiPo Battery Swelling, Leakage, and Failure Analysis
Learn why LiPo batteries swell or leak, how to identify abnormal battery conditions, and how proper design, charging, storage, and inspection reduce failure risk.
3.7V LiPo Battery Reads 0V: Cell and PCM Testing Guide
Learn how to check whether a 3.7V LiPo battery is truly failed or protected by the PCM, and how voltage, protection boards, and testing methods affect diagnosis.
LiPo Battery Production and Storage Guide
Learn how lithium polymer batteries are produced, inspected, stored, and managed in facilities, including cell preparation, PCM assembly, capacity testing, aging, storage voltage, and safety controls.
From raw materials to the final battery pack, VTCBATT adopts highly automated production to ensure the safety, consistency, and reliability of the lithium polymer batteries. Automatic production can not only enhance the quality, but also improve the cost-effectiveness.
VTCBATT lithium polymer batteries pass CE, ROHS, UL, IEC, CB, UN38.3, MSDS, BIS, and KC certification, boosting the global sales without any obstacle and helping end customers save extra certification costs.
Compared with other battery manufacturers with a 35-40-day lead time, VTCBATT can speed up the manufacturing and shorten the lead time to 20-25 days, which can ensure your smooth supply chain and quicker product launch.
Compared with other NCM and LMO materials systems, VTCBATT insists on using LCO materials to ensure above 80% capacity retention even after 500 cycles. Totally, the VTCBATT-branded lithium-polymer battery can maintain a 1000-cycle lifespan.
The lithium ion polymer battery has an ultra-low self-discharge rate of 1%-3% per month.
Even after several months of storage without charging, the li-ion polymer battery can retain its capacity to power the devices and avoid over-discharge.
VTCBATT can do a fully customized design for customers in different sizes from 1mm thickness to 20mm thickness, various capacities from 10mAh to 20Ah, and different discharge rates from 1C to 50C.No matter what you want, VTCBATT can provide full customization for you.
Custom lithium polymer batteries can be used in several industries. The following are their common applications
Drones are a major application for LiPo batteries. Because drones require lightweight, long-lasting batteries, like nickel-metal hydride and lead-acid batteries are difficult to apply due to weight. Our LiPo batteries offer fast response times (< 1 second), and a 2450mAh LiPo pack can provide one hour of flight time, making them the preferred choice for drone manufacturers.
Most IOT devices now use customized LiPo batteries.
Compared to traditional NiMh and Nicd batteries, LiPo batteries are flexible, safer, lighter in weight (equivalent to saving ⅓ weight ), and they are maintenance-free, which makes the IOT devices much smarter and tailor-made for space saving.
Pacemakers are one of the most popular applications for LiPo batteries. Because they require batteries with a lightweight and long lifespan. Usually, our lipo batteries have an over 3-year lifespan, even near the die, they can still provide stable output. Their size is only half of the pacemaker, making them suitable for any pacemaker.
Mostly,lipo batteries are assembled with PCB,which can prevent the battery from overcharging, overdischarging, overcurrent and overtemperure. Only if the PCB works fine,the Lithium polymer ion batteries can still recover from overcharging.
If the PCB is damaged or the lipo batteries without PCB,overcharged lithium polymer batteries will be permanently damaged and very difficult to repair. If you try to repair it yourself, we do not recommend it because overcharged lithium polymer batteries have the risk of fire. If you have any technical questions about our lipo batteries, please feel free to contact us.
IC is Integrated Circuit, used to monitor the voltage, when a lipo battery is above or below the voltage limit while charging or discharging, the IC will stop the battery from operating or stop the battery working. In multiple lipo cell batteries, they can also serve to balance the charge levels between cells.
MOS full name Metal Oxide Semiconductor, is often referred to as MOSFET(Metal Oxide Semiconductor Field Effect Transistor), which is a safety device against short-circuiting or overloading of lipo batteries. The device also cuts off the connection between the Li ion battery and the power supply If excessive current is detected. In multiple lipo batteries MOS will complement the IC to manage charging and discharging efficiency.
This depends on the environment in which the batteries are stored, how often they are used, how they are used, etc. In the case of lipo batteries for consumer applications, they usually last around 18-24 months, or longer if used correctly.
This is mainly due to the structure of the lipo battery, they usually use a gel-like electrolyte, under the overcharged, high voltage, the electrolyte will decompose and react, producing flammable gases.
In addition, aging of the battery will form SEI membrane thickening and other reactions, these reactions will also release gases leading to swelling.
Their main differences are in electrolyte, construction and customizable flexibility.
The electrolyte for lithium-ion is usually liquid, and in order to store this electrolyte, lithium-ion batteries are constructed as hard-shelled cylindrical cells. Lithium polymer batteries use a solid or gel electrolyte, allowing for a soft, flexible pouch structure.
In addition, lithium-ion batteries have lower internal resistance, higher energy density, and longer service life (500-1000 cycles) in 3C digital electronic equipment applications. On the other hand, Lithium-polymer batteries are lighter and better suited for applications with strict shape and thickness requirements.
When you find the lipo batteries are not responding, please check the voltage of each cell with a voltmeter first. If the cell voltage is lower than 2.0V (per cell), it means the batteries are damaged; please do not continue to charge or use them.If the cell voltage is higher than 2.5V, normally the lipo batteries are protected by PCB, you just need to charge the battery at low current 0.2C. After the charging,the battery will be activated.If not,it is just due to the PCB damaged and you need to replace a new PCB.
Note:The PCB will be soldered on the lipo cell tab.You just need the test the cell positive and negative tab welding joint.There is no need to disassemble the PCB.
A: Lithium polymer battery is a kind of rechargeable lithium battery, composed of polymer electrolyte, soft and flexible aluminum film, graphite as the anode, and LiCoO₂ as the cathode. In the charging process, the lithium ions move from the electrolyte to the cathode, making the electrons provide power. In the discharge process,the LiCoO2 receives lithium ions.
Below are the typical features of lithium polymer batteries.
1. Customize size. The lithium polymer batteries can be customized into different sizes and shapes.
2. High Energy Density. The lithium-polymer batteries feature 200Wh/kg to 300Wh/kg high energy density.
3. Lightweight. The lithium-ion polymer batteries are lighter than traditional lithium-ion batteries without the steel case.
A: Lithium polymer batteries are very popular and common in our daily devices, such as earbuds, smartwatches, smart AI glasses, toys and medical devices. Lithium polymer batteries are hazardous waste, which will cause pollution to the environment.
Improper disposal will cause fire, explosion or toxic chemicals in case of misuse. It’s important to follow up the correct procedures to dispose of lithium polymer batteries.
Step 1: Stop using the lithium polymer batteries that are swollen, punctured, and leaked.
You can fully discharge the batteries to 0V to avoid any short-circuit, fire and explosion risks. Then, insulate the battery terminals and put the batteries in a separate plastic bag or fireproof bag.
Step 2:Don’t throw the wasted batteries in the trash directly. You can search the Recycling Center near you. Most store supply chains, such as Best Buy, Home Depot, Walmart, and Decathlon, have battery recycling bins and you can throw the wasted batteries into it directly.
Step 3: You can also handle the wasted lithium polymer batteries at the certified recycling center, but you need to pay for it. Or you can also use official battery recycling locators (e.g., Call2Recycle, B-cycle, Earth911).
There are different disposal regulations in different countries, such as the EU Battery Regulation 2023 in the European Union, the California Code of Regulations, etc.
A: Yes. Lithium polymer batteries are allowed on planes. But the power of the lithium polymer batteries should be less than 100Wh. You can only take a few, and different airlines have different limits on the exact quantity.
A: First, you need to choose a specified lithium polymer battery charger that supports CC/CV mode charge. The favorable charge current for a lithium polymer battery is 0.2C/0.5C/1.0C.
Don’t charge the lithium polymer battery with a charge current above 1.0C, which will not only cause safety risk and heat, but also shorten the lithium polymer battery’s cycle life.
Most lithium polymer batteries are charged by the internal circuit module with a connector matched with the lithium polymer batteries. You just need to connect the connectors.
A: Yes. Lithium polymer batteries are safe. Due to the flexible aluminum film, the lithium polymer batteries will only bulge, but will not explode.
A: Before storage, a lithium polymer battery should be charged at 50%-60% SOC under a 20-25℃ temperature range, which can reduce the minimum capacity loss and avoid over-discharge after several months storage.
A: Yes. Li polymer battery is a lithium battery. Composed of soft aluminum film, polymer electrolyte, a lithium-ion polymer battery can be customized into any size.
A: Yes. Lithium polymer batteries are good. Due to their flexible size and lightweight, the lithium polymer batteries are widely used in many applications, such as medical devices, IOT, GPS trackers.
A: Yes. Lithium polymer batteries are rechargeable.VTCBATT lithium polymer batteries can support 500-1000 times cycle life. Normally, it can be used for a 1-2 year lifespan.
A: Yes. Lithium polymer batteries are safer than lithium ion. Due to the soft aluminum film, the lithium polymer battery will never explode, but only bulge, while the lithium ion battery is provided with a steel case, which will explode directly under misuse.
A: No.You can’t overcharge the lithium polymer batteries,which will cause fire,explosion and have safety risks.
A: Yes. Lithium polymer batteries can explode, but mostly they will only bulge under short-circuit, overcharge,over-discharge, and thermal runaway situations.
A: No.Lithium polymer batteries don’t have a memory effect.Shallow charge and discharge will prolong the battery life.It is favorable to keep the battery at 20%-30% capacity retention before charge, which will not harm its long-term capacity. On the contrast, frequent fully charge and fully discharge will reduce the battery lifespan.
A:Lithium polymer batteries consist of a polymer electrolyte, a ceramic separator, a graphite anode, and a LiCoO2 cathode. The electricity will be generated by the lithium ions(Li+) moving from the anode to the cathode. During the charging process,the anode accepts the lithium ions moved from the cathode.The lithium ions moved back and forth, causing the battery to produce electricity.
At VTC Power, safety, reliability, and precision are at the core of our custom lithium polymer battery manufacturing. Every lithium ion polymer battery undergoes rigorous 100% full inspection using advanced Comprehensive Battery Testers before leaving our factory.
Watch the video below to see how our engineering team performs real-time quality control checks to ensure zero-defect performance, optimal safety, and long cycle life for your devices.
Transparency and data-backed quality assurance are guaranteed with every shipment. We issue a comprehensive OQC Test Report for every production batch, ensuring complete voltage consistency, internal resistance matching, and safety compliance.
Key Parameters Included in Our OQC Report:
An Example of a Test Report:
Customer(客户) | VTC010004 | PO. No. (订单号) | PO22000615 | Q’ty(订单数) |
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Crafts No. | VTC010004-ER-H-1023 | Model(型号) | VTC-LP654040 | LOT(送检数) | 200PCS | |||||||||
Sampling standard(抽样计划) :MIL-STD-105E Single IL=｛Ⅰ□ Ⅱ■ Ⅲ□ Normal□ Tightened□｝ Critical(致命)Ac/Re=0/1 R√全检 | ||||||||||||||
Stapled Defect(缺陷分类) | AQL(允收水准) | Sample Size（样本大小） | AC/RE(允收/拒收) | |||||||||||
CRITICAL(致命) | AQL=0 | 各20pcs(尺寸/功能/性能) | 0/1(各记录10组数据) | |||||||||||
MAJOR(严重) | AQL=0.25R 0.40□ | 200PCS | 1\2 | |||||||||||
MINOR(轻微) | AQL=0.40□ 0.65R | 200PCS | 1\2 | |||||||||||
Inspection Items 检验项目 | Spec 标准或订单要求 | Test Result 检验结果 | CR | MA | MI | OK/NG | ||||||||
Appearance 外观检查 | Label & 标贴/印字 |
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| 0 | 0 | 0 | OK | |||||||
Appearance 外观 | No | No scratch,leakage,bulge | 0 | 0 | 0 | OK
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Connector | PHR-3P Positive | OK | 0 | 0 | 0 | OK | ||||||||
Wire model | UL1571-24 AWG 55+/-3mm | OK | 0 | 0 | 0 | OK | ||||||||
Dimensions 尺寸(mm) | Thickness厚度 | T≤6.7mm | 6.12mm 6.10mm 6.11mm 6.10mm | 0 | 0 | 0 | OK | |||||||
Width宽度 | W≤40.5mm | 39.21mm | 0 | 0 | 0 | OK | ||||||||
Length 长度 | L≤42.5mm | 41.15mm | 0 | 0 | 0 | OK | ||||||||
Open 开路电压(v) | ≧3.65V | 3.784V | 0 | 0 | 0 | OK | ||||||||
Capacity 容量（mAh) | ≧1200mAh | 1285mAh 1216mAh | 0 | 0 | 0 | OK | ||||||||
Resistance内阻(mΩ） | ≤200 | 122.0mΩ 119.1mΩ 117.7mΩ 118.9mΩ | 0 | 0 | 0 | OK | ||||||||
Over current过流 | 3.5-5.5A | 4.220A | 0 | 0 | 0 | OK | ||||||||
Packing Method/装箱方式 |
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| OK | ||||||||
Result(结论) | Pass(合格) | |||||||||||||
Inspector(检验员) | Liu Lili | Inspected Date(日期) | 2025.1.10 | |||||||||||
Check by(审核) |
| Approved by(批准) |
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Remark | ||||||||||||||
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