Built-in protection circuit (PCM) prevents over charging/discharging.
⚡ 3.7V 401020 200mAh LiPo Lithium Polymer High Capacity Battery ⚡
⚡ 3.7V 402030 200mAh LiPo Lithium Polymer High Capacity rechargeable Battery ⚡
3.7V 200mAh LiPo 1S Polymer Rechargeable Battery: MP3 GPS Speaker Watch - 402030
3.7V LiPo Polymer Rechargeable Battery 200mAh 402030 For MP3 GPS Headpho
3.7V 200mAh LiPo Rechargeable Battery 402030 JST 1.25mm 2pin Plug For Bluetooth
3.7V 200mAh Lipo Rechargeable Battery For MP3 Bluetooth Headphone Headset 501522
