LP-E4 LPE4 Battery Charger LC-E4 For Canon EOS 1Dx 1Ds Mark III EOS 1D Mark IV Auto switching power voltage from 100V-240V AC Charger indication 30%, 50%, 80%, 100%. Which can prevent the overcharge and overdischarge. Fast charge with automatic constant current control prevents battery from overcharging, short circuit, and electronic shock. The charger is for charging your battery only. It does not work as AC adapter for your digital camera or camcorder. 30 Days Money Back Guarantee / 12-month worry free warranty for our product. Please contact us with any questions or concerns.