The Swit KA-R31S plate Hotswap V-mount for Alexa MINI / MINI LF has battery cells inside, and when you change the battery, the plate will take care of the power supply for at least 2 minutes until a new battery is installed. Thus there is no need to turn off cameras with this hot-swap plate. it has a CNC aluminum housing, 4 battery cells inside, rated voltage of 14.4V, capacity of 43Wh, constant high load of 200W. The full capacity plate guarantees at least 2 minutes at 200W load even after 1000 cycles. The device has an LCD screen that displays the countdown of seconds when the battery is changed. When the battery is removed, the screen performs a 120-second countdown. Simply insert a new battery before the countdown drops to 0, the new battery will also charge the hotswap plate. The plate has a net weight of 875 grams for a size of 93 x 143 x 53mm, also supports 3GSDI 1 to 2 distribution, with SDI isolator inside to prevent other superior SDI devices from damaging the camera’s SDI port.