ANART 900mAh Rechargeable Battery (2-Pack) and Rapid Dual Charger for SJ4000 SJ5000 SJ6000, for ANART/GeekPro/DBPower/GooKit/RioRand Action Camera Nice little battery charger, not big and bulky like some. This is not much bigger than a match box. Its design, however, allows for two batteries being charged at the same time. Newest top quality battery features 3.7V, 900mAh with safer,longer life. Includes 2pcs 900mAh batteries, 1pc Dual USB charger, 1pc Micro USB cord. Allows you power the Dual USB Charger with included Micro USB cable.Can be powered with most standard USB Wall or Auto Charger or a computer. Charges two SJ4000 camera batteries at the same time and Smart LED light indicated RED when charging and GREEN when complete.