Flylinktech Action Camera Battery Charger with USB Cable 3.7V Battery Charger Holder for Action Camera SJCAM YI WiMiUS Compatible with SJ4000 and SJ4000 WIFI Cameras Output:DC 5.0V-1A. Charging your spare battery for outdoor support. Input:100-240V AC 50/60Hz. Fast charging via USB cable included Original 3.7V Li-ion Battery Charger Black Portable design and convenient, easy to take and use