Batteries are the lifeblood of all photographers. Even film photographers have fun with batteries, because our flashes and meters and whatnot all end up requiring power. And, even more than memory or film, batteries are one of the biggest items we're always frustrated by. My G7 and most digital SLRs are fairly nice, in that you can (and should) pull the battery from the camera after you are done shooting and stick it in the charger. But then I start dealing with batteries for my flash.

Previously, I talked about the basic facts behind batteries. Now, let's talk about how to put them into practice...