3.7V 50mAh Lithium Polymer Battery AS401119
Ultra-compact 3.7V 50mAh lithium polymer battery (AS401119) with integrated Seiko S-8261 protection circuit and 10K NTC thermistor. Weighs just 1.8g at 4.0mm thin with 3-wire bare leads (UL3302 32AWG) — ideal for TWS earbuds, hearing aids, and mini IoT devices. OEM/ODM customization available.