This dedicated charger recharges Ni-MH Pack NP-E2 and NP-E3 quickly, taking about 100 minutes for one Pack. It also prevents excess charging. Two packs can be attached at one time. The discharge feature (taking about 8.5 hours) cancels the battery pack's memory effect. Supplied with USA plug connection, but has a voltage range of 100 - 240v AC, and can be used worldwide with the right outlet adapter.