Batteries can be the bane of the existing of any digital camera owner. If you choose standard disposable (typically AA) batteries and intend to use the LCD screen often, be prepared to spend almost as much on the batteries as you did on the camera over the course of a year. A better bet is to invest in two sets of quality rechargeables and a charger.
Many vendors now provide a rechargeable Lithium Ion battery pack for their models, an investment well worth making as it extends the maximum battery life to well beyond what it possible with standard rechargeables on a single charge. If your model supports it, consider purchasing an optional AC adapter or dock for your camera, since transferring photos to your PC is also a huge drain on batteries.
