Panasonic FZ-G1 Series Operating Instructions - Basic Manual page 18

Handling and Maintenance
5. Pull back the sheet (D) in the cover, and then remove the black screws (4).
6. Remove the connectors of the built-in bridge battery and remove the built-in bridge
battery (E).
Insulate the connectors on the built-in battery by covering them with plastic tape,
for example.
18
D
E