Powerextra 2 Pack Replacement Batteries and Rapid Travel Dual Battery Charger for GoPro HERO4, GoPro AHDBT-401, AHBBP-401 with Power Bank Function for iPhone, iPod, Android Phone and Other USB Devices Package includes 1 X 5200mAh dual charger, 2 X 1100mAh replacement Gopro hero4 battery, 1 X micro USB cable. Perfect external charging station for Gopro HERO4 batteries, no cable needed to charge 2 AHDBT-401 batteries at the same time when outside, solving the low power problem for your digital devices on-the-go. 2 in 1 function,5200mAh high capacity enables you to recharge your GoPro Hero4 batteries and external USB devices anywhere anytime without the need for a wall outlet or a car charger. Built-in LED lights indicate the charging status. Multi-charge capability makes charging easy and convenient. Superior quality: Constructed with Grade A cell to ensure the highest quality and safety. 5200mAh capacity is a necessary assistance to keep your Gopro HERO4 and other USB devices active when you are camping, traveling,adventuring and in other outdoor activities