You will get a warning message on your FZ152 "Battery temperature is too high" if your camera and battery exceed the recommended operating temperature of 136° while in use or if sitting in extremely hot environments.
Let the battery and camera completely cool and remove the rechargeable li-ion battery in order to do this. The warning message should disappear 2 seconds after camera and battery is operational.
We recommend keeping your FZ152 and li-ion battery in cool storage places and not leaving the camera and li-ion battery in hot cars, direct sunlight and other environments such as these.