Normal alkaline AAs are fine for the casual shooter, but in the long run, you’ll save money with rechargeables. Duracell and Energizer are good, but my favorite is Tenergy (sold at all-battery.com), which are cheaper and have worked well for me. Get a charger that is “smart,” in that it doesn’t stop just on a timer. I like the Duracell CEF90NC 30 Minute Charger, though I have an older version. Mine doesn’t take long (one hour), has built-in cooling, stops based on some sort of charging detection system that works well, and has worked without fail for 2+ years. The new model should do the same, unless they’ve messed things up. Then, you won’t have to change batteries often, unless your camera is particularly power-hungry. The charger runs $30 and comes with 4 Duracell batteries. Avoid 15 minute or faster chargers, as they stress your batteries more, are prone to overheating, and cost more.
When I got my first digital camera, I bought a charger with four AA batteries for $10. The charger took 16 hours, and would not stop automatically. It was inevitable; I charged the batteries for 24 hours once, but fortunately there was no apparent damage, likely because the charger is less apt to damage batteries for being so under-powered. One month later, one of the batteries leaked acid. If it had been in the camera, it would have corroded the contacts and perhaps render it unusable. I bought new batteries, but continued using the original three for my CD player. Another month later, I opened the player to find that the battery had leaked, and the acid had …
