3PCS 900mAh 3.7V 900mAh Rechargeable Battery (3-Pack) and Rapid Dual Charger for SJ4000,SJ5000,SJ6000 Kit includes: 3 batteries and 1 Dual USB charger for the SJ4000 Battery Specifications: 3.7V 900mAh Li-Polymer Battery Pack Charges two SJ4000 camera batteries at the same time and Smart LED light indicated RED when charging and GREEN when complete Can be powered with most standard USB Wall or Auto Charger or a computer Allows you power the Dual USB Charger with included Mini USB cord, also you can use your own micro usb cable.