621537 3.7V 300mAh Lithium Polymer Battery for Wearable Devices, Bluetooth Trackers, Portable Sensors
| Model | VTC-LP621537 |
| Voltage | 3.7V |
| Capacity | 300mAh |
| Max Size (Thickness x Width x Length) | 6.2mmX15.5mmX39mm |
| Operating Temperature | -20℃ to 60℃ |
| Standard Charge Rate | 0.5C |
| Standard Discharge Rate | 1C |
| Configuration | 1S1P |
| Weight | 7.5g |
lipo 3.7 v 300mah battery for Wearable health bands, smart tags, and handheld controllers
VTCBATT is an experienced lithium polymer battery manufacturer specializing in custom rechargeable LiPo battery solutions for compact electronic devices. With more than ten years of production experience and hundreds of successful battery models, VTCBATT provides 3.7V lithium polymer batteries, including slim pouch cells, custom-shaped batteries, and high-density battery packs. Our LiPo battery solutions support customized capacities, dimensions, thicknesses, wire lengths, connectors, labels, terminal structures, and protection circuit designs to meet different device requirements. We offer over 5,000 standard lithium polymer battery models ranging from 0.4mm to 14mm thickness and 8mAh to 10,000mAh+ capacity, while also supporting series and parallel configurations for higher voltage or capacity requirements. These batteries are widely used in wearable devices, IoT products, medical electronics, smart devices, and other space-constrained applications where lightweight design, high energy density, and flexible customization are critical.
Temperature Performance
VTCBATT lipo 3.7 v 300mah battery can be discharged from -20℃ to 60℃.
This wide temperature range performance enables the battery to operate in many conditions.
Low Self Discharge Rate
After 30-day and 60-day storage, there is slight 1%-2% slight voltage decrease under 50% SOC at 25°C.
Strict Cell Match
Strict cell match standards in 10mV voltage tolerance, 5mAh capacity tolerance, and 1mΩ to ensure excellent performance of the total lipo battery pack.Furthermore,the PCB with cell balance function can long-lasting power supply without any failure.
Full Certification & Extended Warranty
VTCBATT LiPo batteries meet global certifications including CB, CE, UL, and UN38.3, and offer a 14-month warranty—two months longer than standard—to maximize customer confidence and profit.
VTCBATT lipo battery passed all the major global certifications, such as CB, CE, EN61000,IEC62133,MSDS.UN38.3,ROHS,UL,BIS,KC Certification,which makes your product more competitive.
Compared to a normal 12-month warranty, VTCBATT lipo batteries have 14-month warranty and two extra months for shipping and customs clearance ,which ensure the customer’s profit.
VTCBATT Production and Service
Benefited by an automatic production line, VTCBATT’s modern facility adopts 200+ key factors detection in the whole manufacturing process from raw materials mixing to final battery cells assembly. Thanks to the smart MES system, all the manufacturing processes and flows are under strict monitoring and recorded automatically.Based on core principle of long-term value and win-win cooperation, VTCBATT’s passionate sales and skilled engineers will not only offer pre-sales consultation,but also after-sale services within 24 hours known for responsibility and high quality,VTCBATT established long-term business with worldwide customers over 80+ countries.
From the raw materials mixing to the cell test, VTCBATT adopts an automatic manufacturing process to maximize production efficiency and enhance the batteries
quality, safety, and reliability. The entire manufacturing process is monitored and 100% tested before flowing to the next procedure to ensure zero defects before delivery.
Over the past 20 years, VTCBATT has built strong partnerships with customers in more than 50 countries worldwide. With reliable quality, responsive service, and tailored battery solutions, we have earned the trust of our clients—many of whom have maintained long-term cooperation and lasting friendships with us for over a decade. Together, we continue to grow and move forward toward a brighter future.
Application for VTCBATT 621537 3.7V 300mAh Lithium Polymer Battery
