Digital Camera Batteries

Your patience and money, that is.
The expected performance of digital camera batteries is often overlooked when shopping for a camera. Digital cameras are high drain devices so it's important to know how many shots a fully charged battery will deliver. Having to frequently stop and change or recharge the batteries will definitely put a damper on a photo outing.
Digital Camera Battery Types
Digital cameras typically employ either a rechargeable battery pack or standard AAA's. Most newer battery packs use lithium ion (Li-ion) battery technology. Specs vary but the better ones can be recharged in a couple of hours or less and will last through several hundred shots.
Many inexpensive digital cameras are powered by AAA batteries. This is extremely convenient since virtually every store sells these batteries. But even so called "super alkaline" batteries won't last long, and replacing them quickly becomes an expensive proposition.
Time and Money Saving Battery Tips
If the camera uses AAA batteries, a wise investment is rechargeable batteries. Newer Nickel Metal Hydride (NiMH) batteries are best. They are less prone to the so-called "memory effect" of older Nickel Cadmium (NiCad) batteries. And they last longer per charge than throwaway alkaline batteries. Just make sure to get quality rechargeable batteries rated 1600 mAh or higher. They cost a little more but are well worth it in the long run. Also buy a good charger and at least one extra set of batteries.
With a battery pack, unlike AAA's, you're pretty much stuck with the battery designed for the camera. There may be higher powered upgrade options, but it's critical to check the specs for expected life per charge as well as professional reviewer comments. Even with the best camera and battery pack, at least one fully charged back-up is recommended.