Panasonic has issued an important notice to the owners of numerous Panasonic digital still cameras. These include a number of FX, FT, TZ and ZS models as well as the G1 and GH1 interchangeable-lens digital cameras. Panasonic claims that if you use third-party batteries instead of genuine Panasonic battery packs, overcharging, internal heating or short circuit may occur, possibly leading to personal injury. The company has therefore issued a firmware update to all of these cameras that enables them to tell if a non-genuine battery is inserted, and to refuse drawing power from it. This of course means that after updating your camera’s firmware, you will not be able to use third-party batteries any more.