VTCBATT VTC18650-4S1P 14.4V 3.5Ah Cylindrical Li-ion Rechargeable Battery Pack for robotics battery modules, portable lighting systems, security monitoring equipment
| Parameter | Specification |
|---|---|
| Model | VTC18650-4S1P |
| Battery Type | Cylindrical Lithium Ion Rechargeable Battery |
| Pack Configuration | 4S1P 18650 battery pack |
| Nominal Voltage | 14.4V |
| Nominal Capacity | 3.50Ah |
| Energy | 50.4Wh print code shown in drawing |
| Standard Charging Current | 0.2C / 1.4A |
| Standard Discharging Current | 0.2C / 0.7A |
| Maximum Discharging Current | 7A |
| Internal Impedance | ≤200mΩ |
| Weight | 210g |
| Pack Dimensions | 19.5 x 72.0 x 75.0mm max |
VTC18650-4S1P 14.4V 3.5Ah Cylindrical Li-ion Rechargeable Battery Pack Manufacturer in China
The VTCBATT VTC18650-4S1P is a cylindrical Li-ion rechargeable battery pack designed for 14.4V equipment requiring a compact 4S1P 18650 battery structure and 3.5Ah nominal capacity. According to the product specification, the pack provides 14.4V nominal voltage, 3.50Ah nominal capacity, 3.35Ah minimum capacity, 16.8V maximum charge voltage, 10V discharge cut-off voltage, 1.4A standard charge current, 3.5A rapid charge current, 0.7A standard discharge current, and 7A maximum discharge current.
The pack dimensions are 19.5 x 72.0 x 75.0 mm max, with 100+/-5 mm UL1007 18AWG red and black leads, a 6.35 x 0.8 mm female positive terminal, a bullet female negative terminal, blue PVC wrapping, PCM protection, and a 70 deg C overheat protection value listed in the datasheet. VTCBATT supports factory supply, sample development, connector and wire matching, label customization, OEM/ODM lithium battery pack production, and stable batch supply for equipment manufacturers and battery wholesale customers.
18650 4S1P 14.8V 3.5Ah Temperature Profile (High Drain)
As current increases, temperature rises faster due to internal resistance. Under high-drain conditions, pack temperature may exceed 90–110°C without protection.
Note: Ambient temperature (>30°C) significantly affects heat buildup. Proper thermal management and BMS protection are recommended.
18650 4S1P 14.8V 3.5Ah Discharge Capacity Comparison
Higher current leads to increased voltage sag and reduced capacity. The pack maintains ~95% capacity at ~1C and ~90% at higher loads.
At extreme discharge levels, capacity may drop to 65–75% before reaching the 10.0V cut-off (2.5V/cell).
Customization
VTCBATT can support full customization of the 18650 batteries in different capacities, connectors, discharge rates, and cases. Just inform us of your specific requirement, and our professional engineers can provide you with the customized lithium ion battery proposal.
Full Certification & Extended Warranty
VTCBATT 18650 30p 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 18650 30p 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 18650 batteries have 14-month warranty and two extra months for shipping and customs clearance ,which ensure the customer’s profit.
VTCBATT Production and Service
VTCBATT not only focuses on customized design and excellent service to meet the diverse demands of different customers, but also devotes itself to precise and standardized manufacturing in every process to ensure the highest-quality batteries. Meanwhile, VTCBATT will provide comprehensive support from pre-sales to after-sales, focusing on customers’ feedback to establish long-term and win-win cooperation. VTCBATT professional sales and technical engineer teams will be your best custom battery experts to assist with reliable and fast services at any time.
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 4S1P cylindrical 18650 lithium ion battery
This 14.4V 3.5Ah Li-ion battery pack is suitable for portable medical devices, industrial handheld terminals, mobile test instruments, robotics modules, portable lighting systems, security monitoring equipment, electric sprayers, and custom 14.4V equipment that needs a compact rechargeable battery pack with moderate discharge capability. The 4S1P cylindrical 18650 format gives the pack a slim rectangular profile, while the 16.8V charge limit, 10V discharge cut-off, PCM structure, 18AWG output wires, and specified terminals make it practical for equipment that requires a protected replaceable battery module. For application-specific projects, VTCBATT can support connector matching, terminal selection, wire length adjustment, NTC or protection circuit configuration where required, outer label design, sample testing, and batch production. VTCBATT provides factory-direct custom lithium battery pack supply and battery wholesale support for distributors, equipment brands, and OEM/ODM manufacturers developing 14.4V rechargeable battery systems.
