Lanparte LP-E8 E8 Camera Power Coupler DC Fake Dummy Battery Pack For Canon EOS T3i T4i Can be Connected to the Outside Battery Resource For Any Canon DSLR That Used LP-E8 Battery Battery Adapter Only Can Use for Canon 550D 600D 650D Uses low voltage power input 7.4V-8.4V, unlike other non-decoded DC couplers which run on high voltage input 16V to bypass camera protection system it actually replaces the LP-E8 battery.By using the power kit, your camera can work much longer time