If you only have the one battery and you are having to recharge it after not much usage, then perhaps the battery is beginning to fail and needs replacing. Even rechargeable batteries have a life span. (Also read below about turning off the GPS function)
If you have a spare battery, does it last as long as the first battery or longer?
If it lasts longer, then again perhaps the first battery is beginning to fail and should be replaced.
If the spare battery only lasts about as long as the first battery, check to see if the GPS feature of the camera is switched ON.
If it is, try switching it OFF and see if your battery life improves. Running the GPS feature consumes a lot of power.
Here is a link to the User Guide for your camera, scroll to p.45 to see how to activate / de-activate the GPS feature.