EforTek U.S. Edition AZ13-2 Battery (2-Pack) and Dual USB Charger kit for AZ13-2 and Xiaomi YI Action Camera(Only for Official U.S. Edition) Kit includes: 2 batteries and 1 Dual USB charger for the Xiaomi YI Action Camera(Official U.S. Edition Only) Battery Specifications: 3.7V 1010mAh, Rechargeable Li-ion Battery Pack Charges two AZ13-2 YI camera batteries at the same time and Smart LED light indicated RED when charging and GREEN when complete Batteries and charger are fully compatible with YI Action Camera Official U.S. Edition(NOT COMPATIBLE with the International Version from YI Technology);The international edition has a thinner battery Integrated Microchip Prevents Overcharging & Lengthens Battery Life and all items include a 2-year manufacturer warranty