You need to know what kind of camera batteries any camera takes. Does the camera take a brand-specific camera battery or does it take a general size of battery?
For example, a lot of traditional automatic cameras run on AA or AAA batteries. They only need that size. They don’t need a specific brand.
These kinds also can be disposable or rechargeable. These batteries are also incredibly common and are sold just about everywhere.
Even though your camera might not be brand specific, you still need to know how easy it will be to get replacement camera batteries. You might have to go to specific electronic stores if the camera battery size is rare, or unusual. If this doesn’t bother you, then keep in mind whenever you go on a vacation, you need to bring spare camera batteries in case the stores where you are don’t carry your camera’s size.
Sometimes the camera battery costs more than a camera is worth. Keep in mind how often you are going to use this camera. The more you use your camera, the more you will have to change the battery.
You could opt for rechargeable batteries, but not all sizes of camera batteries will recharge. Most li-ion (lithium-ion) will, though.
If you don’t use your camera all that much, then perhaps the camera battery cost will be a moot issue. One good trick to keep you up to date with your camera battery needs, without spending a penny, is to ask for them as a gift on your birthday or gift giving occasions.
If you plan on doing a lot of travel or on location shooting, a heavy camera battery is a nuisance. You need as light a battery as possible. If you only plan on using the camera around your home or on special occasions and don’t need to pack and unpack it, then you do not need to worry about how heavy the battery is.
You never really seem to get an answer as to how long a camera lasts on one battery until you actually use it. For this reason, always see if you can get a warranty on your camera.
A lot of the battery’s use depends on what camera functions you use and how often. Most batteries will tell you an estimated time of use, and try to find the maximum time for your buck.
I hope that I helped clear some of the confusion surrounding cameras and batteries. As you can see it is important to also consider the battery within the camera when you are purchasing a camera. If you don’t pay attention you could end up with a battery that is very hard to find, is too expensive, or too heavy.