Newmowa AZ13-2 Replacement Battery (2-Pack) and Dual USB Charger for Xiaomi Yi Action Camera (Only Compatible with Official U.S. Edition) Included: 2 batteries, 1 dual charger, 1 USB-Micro cord Battery is specially designed for XIAOMI YI Official U.S. Edition Features 3.7V, 1200mAh with safer,longer life Innovative design allowing for two XiaoYi batteries being charged at the same time and Two Independent Smart LED light indicated RED when charging and GREEN when completed