Instruct: Classify Amazon reviews into positive or negative sentiment
Query: poor battery/charger/carmera battery control

When I just bought Dimage Xt, it was able to take ~200 photos with fully charged battery. After 1 year, camera started to show "low battery" sign at power on, even when the battery was freshly charged, and the sign turned into red after ~50 photos and camera shutdown itself after that. Then I bought a new battery, the same thing happened as soon as I started to use it, I can only take ~60 photos with the new battery. I don't know the problem came from battery, battery charger, or battery controller in camera.While you can keep a few batteries as backup, but sometime it's not an option. I have a marine kit and take underwater photo, and it's a hassel to change battery in water.