Eneloops as mentioned, and the Maha PowerEx charger are the best I have found. http://www.amazon.com/Maha-MH-C801D-...6962064&sr=8-1 The charger is a bit pricey, but it has a conditioning mode which has brought some lesser batteries back from the dead. Plus each is charged individually, so no worries about charging odd numbers or mismatched batteries.