It would be helpful if we knew the model number of the camera.
Panasonic has made at least ten 7.2 megapixel cameras.
If the camera has a lens that extends when you power-on, it may have failed to park completely when power went off, due to the weak battery.
Gently press on the front of the lens barrel to attempt to seat the lens.
Then (with a good battery) turn-on the camera.
If that does not work, some people report that they slapped the camera on the sides/bottom to free up the lens.
Don't get carried away with the slapping.
You can avoid the low battery problem if you buy a card reader.
Then you don't have to connect your camera to your computer.