3.7V 500mAh Li-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 – Slim LiPo Battery
Voltage: 3.7V | Capacity: 500mAh (1.85Wh) | Size: 43.0×20.5×4.1mm

This 3.7V 500mAh Lithium 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 AWG28) 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 AWG28 50mm |
| Connector | / |
| Dimensions (L x W x T) | 43.0mm x 20.5mm x 4.1mm |
| Charge Current | 0.2C to 0.5C (Standard Charge) |
| Discharge Current | 0.5C to 1.0C (Continuous) |
| Storage Temperature | -20°C to +45°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.











