High quality 631450 3.7v 370mAh narrow design lithium polymer battery is manufactured by VCELL POWER, an experienced battery manufacturer in China. With an excellent R&D team, professional production process control, and quality inspection system, VCELL POWER provides professional lithium polymer battery manufacturing solutions. Please contact us to discuss a customized cooperation plan tailored to your needs.
VCELL POWER 631450 3.7v 370mAh narrow design lithium polymer battery utilizes advanced lamination technology, specifically designed for portable devices that demand maximum space efficiency. It uses a gel or solid electrolyte and features aluminum-plastic soft packaging, offering excellent leak-proof performance and resistance to explosion. The compact design of 6.5mm (thickness) × 14.5mm (width) × 52.5mm (length) and its ultra-thin, narrow structure make it an ideal power solution for wireless headphones, smart bracelets, and mini sensors. It can be used with a professional PCM (Protection Circuit Module) for comprehensive battery protection against overcharging, over-discharging, over-current, and short circuits. Under standard charging and discharging conditions, the cycle life can reach over 700 cycles, significantly improving the durability of the device.
| Battery Type | Lithium Polymer Battery |
| Brand | VCELL/OEM |
| Model | VP631450 |
| Nominal Voltage | 3.7V |
| Nominal Capacity | 370mAh |
| Charge Cut-Off Voltage | 4.2V |
| Discharge Cut-Off Voltage | 2.75V |
| Max Charge Current | 1.0C |
| Standard Discharge Current | 0.2C |
| Max Continuous Discharge Current | 1.5C |
| Peak Discharge Current | 5.0C(<3S) |
| Charge Temperature | 0~45℃ |
| Discharge Temperature | -20~60℃ |
| Dimension(T*W*L) | 6.5*14.5*52.5mm Max |
| Weight | Approx 9.0g |
| Cycle Life | > 700 times |
| Lifetime | >5 Years |
| Wire/Connector | TBD |



1. With a capacity of 370mAh, the Customizable Lithium Battery is lighter and thinner compared to the 14500 cylindrical lithium-ion battery, reducing the overall weight of the device.
2. The long, flat design allows for flexible integration into various narrow spaces or ultra-thin casings.
3. It boasts a cycle life of over 700 cycles, has no memory effect, supports charging anytime, is durable and reliable, and offers excellent value for money.
4. Customization of wires and connectors is available.
5. Complies with international certifications such as RoHS and CE, is free of harmful substances, and is safe and environmentally friendly.
6. Fully inspected before shipment, quality guaranteed.
Wireless Bluetooth earphones, neckband Bluetooth earphones, mini Bluetooth speakers, smart bracelets, Bluetooth glasses, electronic thermometers, portable pulse oximeters, portable voice recorders, GPS trackers, POS machines, barcode scanners, etc.
Q: What does the battery model "631450" represent?
A: This is a standard size code, indicating the battery has a thickness of approximately 6.0mm, a width of 14.0mm, and a length of 50.0 mm. Please confirm that these dimensions are compatible with your device before purchasing.
Q: Can this battery be used directly? Does it require a protection circuit board?
A: It depends on your needs. The bare battery cell itself does not have protection functions against overcharging, over-discharging, or short circuits, and improper use can be risky. The finished battery we provide has a built-in dedicated protection circuit board, providing comprehensive protection for the battery, making it safe and reliable.
Q: When purchasing or replacing batteries, how do you choose the right one?
A: First and foremost, confirm the battery's length, width, and thickness to ensure it fits in the device. It must also have the same 3.7V nominal voltage. You can choose a battery with the same or slightly higher capacity to achieve longer battery life.
Q: What are the differences between this and cylindrical lithium-ion batteries? What are its advantages?
A: The main differences lie in the packaging form and electrolyte state. Lithium Polymer battery use aluminum-plastic film soft packaging and a gel/solid electrolyte, thus offering core advantages such as being thinner, lighter, and having customizable shapes. Cylindrical lithium ion batteries, on the other hand, use a steel shell hard packaging, with fixed volume and shape.
Q: Do you support custom battery capacity or size?
A: We support customization services. We can adjust the battery thickness, shape, capacity, interface, and protection scheme according to your device requirements.
Q: Do you support sample testing?
A: Yes, please contact customer service for specific requirements.
Q: What is the battery's shelf life?
A: Under normal conditions (temperature 20±5°C, relative humidity ≤65%) and unopened storage, the battery's shelf life is typically 12 months. Long-term storage can lead to battery self-discharge. It is recommended to recharge stored batteries every 3-6 months to maintain the voltage within a healthy range.