Premium 3.7V Lithium Polymer Battery with ultra-compact 1654 size design and reliable 120mAh capacity. Features advanced LiPo technology for stable power output and extended cycle life. Precision-engineered with high-grade polymer materials and built-in protective circuit for overcharge/discharge prevention. Ideal for TWS earphones including Galaxy Buds/AirPods Pro, delivering 4-6 hours playback time per charge. Ultra-thin 5.4mm profile with gold-plated contacts ensures perfect fit and corrosion resistance. OEM-friendly design supports bulk customization for wireless audio manufacturers. Wholesale pricing available for 500+ units with industry-leading 1-year warranty.