After all, there are some great brands of rechargeable AAA, AA, C, and D cell batteries available that will last you for years. And I've found that the best way to take care of these batteries is to charge them using a decent charger. Too many chargers pile in the amps, which in turn bakes the battery and dramatically shortens its lifespan. There's a lot more to charging a battery than just pushing power into it as fast as possible.