3.7V 500mAh Lithium-ion Polymer Battery AS702040
Power your portable electronics with our reliable Lithium Polymer Battery (LiPo), model AS702040. This 3.7V, 500mAh (1.85Wh) rechargeable battery pack is engineered for safety and longevity, featuring a built-in Protection Circuit Module (PCM) and an NTC Thermistor for real-time temperature monitoring. Its compact, lightweight design and standard wire leads make it an ideal power solution for a wide range of consumer and industrial devices.
Description
Model AS702040 – Lithium-ion Polymer Battery
Voltage: 3.7V | Capacity: 500mAh (1.85Wh) | Size: 43.0x 20.5x 7.1mm

This 3.7V 500mAh Lithium-ion Polymer Battery is a premium power source designed for modern, space-constrained applications. Housed in a durable silver pouch, the battery utilizes advanced LiPo technology to deliver a high energy density in a slim and lightweight form factor.
The key to its reliability is the integrated safety system. The internal Protection Circuit safeguards the battery from common issues like over-charging, over-discharging, and short circuits, significantly extending its lifecycle. Furthermore, the inclusion of a Thermistor (NTC) allows the host device to monitor the battery’s temperature during operation, preventing overheating and ensuring stable performance under various loads.
Equipped with UL-certified wires (UL3302 28AWG) and color-coded leads (red, black, white), this battery pack is ready for easy integration into your electronic products. Whether you are designing a new gadget or replacing an old battery, this model offers a perfect balance of capacity, safety, and convenience.
Technical Specifications
| Battery Type | Lithium-ion Polymer Battery |
| Part Number | AS702040 |
| Voltage @ Capacity | 3.7V @ 500mAh (1.85Wh) |
| Protection Circuit | Yes (PCM Included) |
| Thermistor (NTC) | Yes |
| Wires | UL3302 28AWG 50mm |
| Connector | / |
| Dimensions (L x W x T) | 43.0mm x 20.5mm x 7.1mm |
| Charge Current | 0.2C to 0.5C (Standard Charge) |
| Discharge Current | 0.5C to 1.0C (Continuous) |
| Storage Temperature | 15°C to +35°C |
Core Advantages
- ✔
Enhanced Safety: Built-in PCM protects against over-voltage, under-voltage and short circuits for safe battery and device operation. - ✔
Intelligent Temperature Monitoring: Integrated NTC thermistor realizes real-time heat detection and optimizes charging and discharging performance. - ✔
High Energy Density: Compact lightweight design delivers larger capacity, supporting streamlined product appearance. - ✔
Reliable & Certified Components: Premium UL certified wire ensures excellent insulation and stable electric connection. - ✔
Ready-to-Use Design: Tinned wire ends facilitate easy soldering and quick product assembly.
Perfect For Applications
Bluetooth headsets, portable speakers, media players, e-readers.
Wireless sensors, smart locks, remote control devices.
GPS trackers, game consoles, digital cameras.
Arduino, Raspberry Pi and lightweight rechargeable power projects.
Customization Services (OEM/ODM)
We understand that every product has unique power requirements. Our custom battery solutions are designed to help you get the perfect fit. We offer a variety of customization options, including:
- Connectors: Equip with JST-PH2.0, JST-XH2.54, Molex and other customized connectors.
- Wire Length & Type: Adjust wire length and specification to match internal structural layout.
- Battery Capacity & Shape: Develop customized cells to meet specific voltage and capacity demands.
- Branding & Labeling: Attach personalized logo, part number and safety warning labels.
Contact us today to discuss how we can tailor this Lithium Polymer Battery to power your next great product.









