My digital camera burns it's batteries really easily, what can I do?

get a high capacity rechargeable battery - something like 2300 mAH or 2500 mAH.

Get a lithium batteries - it's expensive and you can't charge it but it's have high capacity.

buy rechargeables, if you have a viewfinder use it and not very much your lcd screen.

Don't use the flash or the LCD as much if you can help it, also by nickel-metal hydride "Ni-Mh" rechargeable batteries they have a higher energy output.

get rechargeable batteries