Right now, you can pick up a 4-pack of Eneloop AA batteries for just $18. This is a solid price on what’s ostensibly the best consumer batteries you and I could buy. This set has everything you need to start you collection, namely batteries and a charger.
I, for one, use them for my external flash units—and they’re terrific. These are $2 off their standard price, so not a huge discount but, hey, they’re really great batteries.
Alternatively, you can pick up an 8-pack for a low $15. This is a good option if you already have a charger and just want more batteries.