SmallRig 3580 V-Mount Battery Mini VB99 - About 70% of the size of a normal V-mount battery, given its highly integrated design which takes up less space, making it lighter and more portable! Built-in highly integrated BMS chip takes up less space while supporting varied fast-charging protocols and bi-directional 65W (Max) USB-C PD fast charging! Its customized intelligent BMS system ensures faster and safer charging by providing multiple protections against over-current / short-circuit / over-temperature / over-voltage etc.Made of PC heat-resistant and fireproof material, provides safe protection while charging. Such interfaces as USB-A / USB-C / D-tap / DC 8V / DC 12V / V Mount are also included for efficient charging / powering of camera / camcorder / monitor / wireless video transmitter / video light / mobile phone / laptop etc. without using a V-mount plate to convert! The BMS chip has a 16bit ADC / power meter algorithm, together with an MCU and an OLED digital display for you