Triple 3-Channel Battery Charger Dock for Gopro Hero 3/3+ AHDBT-201/301, AHDBT-302, Go Pro Hero 4 AHDBT-401 Action Camera Ideal and Innovative design, Multifuctional power charger for charging 3 or 2 or 1 gopro 3/3+/4 batteries at the same time, provide enough backup power for video shooting any place any time. Compatible with all Gopro Hero 4 battery AHDBT-401 and Gopro 3/3+ AHDBT-301,AHDBT-302 batteries Input:5v,2.1A USB cable, support both mini USB and micro USB port input, you are even use your cell phone charger and usb cord to power this triple charger Fast charging for gopro batteries,with 3 channel output. The full charging time for 3pcs batteries at the same time is less than 2 hours 3 independent Smart LED lights indicated RED when charging and GREEN when completed,it is easy to full charge all your backup gopro batteries before film shooting.