Hello, have you got it set to continuous focus? It'll use more power if it's hunting all the time also check the settings for fast startup etc as it'll use more power that way too. Have you checked the firmware on the lenses and camera? Finally, are you using a genuine Fujifilm battery? If it's a third party battery or, even a fake Fujifilm battery that could be your problem too. Failing that, it could be the camera is faulty and that may be the reason for its sale. Oh, one other thing comes to mind, are you using the display or EVF to most of the time to compose your shots, do you use the display to check each shot? Using the display all the time, checking the image after each shot, can all add up to excessive battery use plus if you have the brightness setting to high, especially if you are fighting bright sunshine will eat power. Try just using the EVF more. Hope that helps. Flickr: thesrpspaintshop