YI Action Camera Battery Replacement Rechargeable Lithium Polymer Battery: Only fit for YI 1080p action camera(the first generation action camera).Can be used as a spare or replacement Battery Specifications: 4.2V/990mAh(min)/1020mAh(typ). YI Technology recommends you to use only the YI authentic replacement battery, we cannot guarantee usage of non-authentic YI batteries. Up to 90 minutes of battery life with a high performance rechargeable battery (990/1020mAh min/typ). Supports difference temperature ranges and capability of withstanding shocks and vibrations. Small and lightweight, the battery delivers efficient energy with less energy loss With minimum capacity of (990mAh), it provides a long use time even during video recording