SWIT KA-S21B B-MOUNT BATTERY PLATE FOR V-MOUNT DEVICES/CAMERAS, 28.8V, HIGH LOADV mount device to use B mount battery 28. 8V (21. 6 33. 6V) input & output SWIT HB A290B and BIVO series compatible RED V Raptor XL 28. 8V power solution Thinner and light weight ###split### KA S21B conversion plate is to use the B mount battery to power V mount cameras or other devices. The ID pin of the B mount plate is 28. 8V, so the V mount output voltage is 21. 6 33. 6V range. Please make sure the V mount cameras or devices support up to 33. 6V