For Panasonic Lumix DMC-GM1, DMC-GM5, DMC-GF7, DMC-LX10, DMC-LX15, DMC-GF8 | DC-GX800, DC-GX850 | DC-GF9. Inbuilt into each Dot.Foto battery is a safety system which gives short circuit protection and prevents the battery from overheating.
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