Sufficient V-mount Battery: SmallRig V Mount battery 3579 with high capacity of 3400mAh(50Wh/14.8V), built-in premium li-battery to brings powerful battery life for lengthy videomaking and photography projects, good power backup solution Various Interfaces: This V-mount battery comes with USB-C, USB-A, 8V DC, 12V DC and D-TAP Ports, which are more versatile and support simultaneous power multiple devices, like DSLR cameras, camcorders, monitors, wireless video transmitter, etc. Bi-direction PD Fast-Charging: The built-in BMS intelligent Chip of SmallRig V-lock battery VB50 supports muti-protocol fast-charging (such as PD / QC / SCP / PPS / for APPLE-2.4A etc.), it supports high power USB-C bi-directional PD fast-charging up to 45W Mini & Portable V Mount Battery: Palm-size of Length: 4.21x2.87x1.33 inches, only 0.72 lbs, approximately 30% smaller than traditional V-mount batteries, feel free to carry outside and travel. And you can also keep track of the battery's working status at all times via its OLED screen Safe & Reliable: The V mount battery designed with short circuit, over-temperaure, over-voltage, over-current, over-charge and over-discharge protection. Made by quality fireproof ABS and PC shell frosted to ensure fine touch and durability