MoBatree Smart watch battery for YX-W8B, AYYC-Y1, 380 MAhBrand : MOBATREE Compatible for: YX W8B, AYYC Y1 Model Number: YX W8B, AYYC Y1 Capacity: 380 mAh Battery Cell Composition: Lithium Polymer Best replacement for the original battery with comparable standby and talk time. It holds the charge longer and is free from the memory effect, so you dont have to wait until the battery completely discharges. Capable of handling multiple charge and discharge cycles. This battery is designed specifically for your