LCD screen takes up most power. It is possible to disable this feature unless you really feel the need for it. Using the camera's viewfinder will save power. Another major power consumption is the flash. When you can, use natural light to take pictures and turn off the flash. This will help save battery life when you absolutely need the flash. A third strain on your battery is constantly using the zoom. It takes more power to zoom in and out than it does to keep the zoom at a steady place. Try to find a setting you like and sticking with it as much as possible..
Some other things you can do to make your battery
* Make sure Power Saving mode is on, or just turn the camera off when not using it.
* In cold weather, keep the camera and batteries warm in your jacket until you are ready to use them. The cold drains batteries very fast.
* Store batteries
* Avoid unnecessary playback of already taken pictures. Try to decide when you take the picture if there is a keeper or needs deleted and then refrain from reviewing until the pictures are downloaded to your computer.
* Use the AC adapter. Most digital cameras have an adapter that lets you connect directly to a power point. If you do not plan on moving around a lot and are near an outlet, the AC adapter to increase the life of the batteries.
Need to buy more, or charge the battery is something you will not be able to avoid completely, but with a few precautions this will not be needed very often.