SmallRig 3579 V-Mount Battery Mini VB50,Amazon.com: SMALLRIG V Mount Battery VB50 Black, 50Wh / 3400mAh V Lock Battery with 45W Output, 2H Full Charge, with USB-C, D-TAP, USB-A, Dual DC Ports, OLED Screen, for Cameras, Phones, Camcorders,,VB50 mini V Mount Battery,SmallRig 3579 [VB50 ミニ Vマウントバッテリー]