Neewer NW4000 USB Dual Battery Charger for SJCam SJ4000 SJ5000 SJ6000 SJ7000 Action Camera Newest Top quality USB Dual Battery Charger for SJ4000 SJ5000 SJ6000 SJ7000 Charges two SJ4000 camera batteries at the same time Smart LED light indicates the charging state. RED light shows that the battery is charging ; GREEN light shows that the charge is complete Allows you power the Dual USB Charger with included Mini USB cord, also you can use your own micro usb cable Can be powered with most standard USB Wall or Auto Charger or a computer