Novel 3.7v Lithium Polymer Rechargeable Battery Model 402020 | Compatible With Bluetooth Earbuds, Smart Watches, Wearable Devices and Compact Electronics

The NOVEL 402020 3.7V 400mAh Li-Po Battery is a compact rechargeable lithium polymer battery designed for small electronic devices where lightweight construction and high energy density are essential. Its ultra-thin 20×20×4 mm profile makes it an ideal power source for a wide range of portable and wearable gadgets. This battery is commonly used in Bluetooth earbuds, smart watches, fitness bands, GPS trackers, IoT devices, mini speakers, MP3/MP4 players, wireless sensors, and DIY electronics projects. The recommended charging voltage is 4.2V, with a standard charging current of 0.2C to 0.5C. A protection circuit module (PCM/BMS) is recommended for safe operation. Please ensure you do not overcharge above 4.2V or discharge below 3.0V. Avoid puncturing or crushing the pouch cell, keep it away from excessive heat, and always use a Li-Po compatible charger. The package contains 1 unit and weighs approximately 0.1 grams, making it one of the lightest battery solutions available for compact electronic applications. NOVEL batteries are designed to deliver reliable, stable, and long-lasting power for a wide range of electronic devices and DIY applications. Built using quality cells and advanced safety features, they provide dependable performance for gadgets, portable electronics, RC toys, CCTV systems, emergency lights, Bluetooth devices, routers, wearable devices, and more. Compact, lightweight, and easy to install, these batteries are manufactured by ELECTROV8 PVT LTD in India and are suitable for everyday power requirements.