I really like these rechargeable batteries from Sanyo: the eneloop NiMH Pre-Charged Batteries. Why? Mainly because they are slow drain (yet with decent and consistent power output). Most rechargeable batteries drain completely within several months of their charging. So, they don’t work well in remote controls, flashlights, etc.

These Sanyo eneloop batteries however maintain a charge for over a year of storage (maintaining approximately 85% of their charge)! I just bought 16 of them for some game system controllers, and 8 for my digital camera external flash. They’re reasonably priced (they last a long time and can be recharged hundreds of times), get great reviews overall — a great new innovation in rechargeable batteries. Recommended.