There are basically two types of digital camera batteries. One is the standard AA type and the other is rechargeable. The latter is also known as a proprietary battery as it made by the same manufacturer.
A proprietary type of battery is comparatively more expensive, lighter in weight and more tight and compact. The cost makes the purchase of one or two back-ups slightly prohibitory.
The standard alkaline AA size batteries usually have a very short life – at times even less than an hour, when used in a digital camera. These batteries make good back-ups, especially if you are traveling. A better option would be to use the Nickel Metal Hydride (NiMH) batteries for digital cameras, with a charger. This rechargeable option has a longer life and comes at an affordable price.
