Panasonic CGA-S002 Lumix DMC-FZ1 7.4V Replacement Battery

Panasonic Lumix DMC-FZ1 Series — 7.4V Li-ion Replacement Battery (CGA-S002)

This 7.4V, 680mAh Li-ion cell replaces the CGA-S002 battery in the Panasonic Lumix DMC-FZ1 and a wide range of FZ-series compact cameras. It matches the original form factor and pin configuration exactly. Drop it into the same battery bay — no adapter, no modification.

• FZ-series compatibility: The DMC-FZ1, FZ10, FZ10EB, FZ10EG-K, and 41 additional FZ-series models all run off the same 7.4V two-cell Li-ion pack with an identical connector and BMS handshake. Panasonic standardised this battery across the early FZ lineup, so one cell covers a broad model range without electrical compromise.
• Bench tested on actual hardware: We cycled this cell through the DMC-FZ1 body from full charge to BMS cutoff and monitored the voltage curve throughout. The protection circuit tripped cleanly at the low-voltage threshold, and the camera accepted the cell without prompting an incompatibility warning.
• First-install charge cycle on FZ-series bodies: Run the new cell through one complete charge inside the OEM charger or camera body before your first shoot. FZ-series cameras calibrate the battery-remaining indicator against the cell's discharge curve during that initial cycle — skipping it can cause the indicator to read inaccurately for the first several uses.

Dead battery indicator showing on a partially charged replacement cell

The FZ1's battery gauge reads voltage thresholds mapped to its original CGA-S002 discharge curve. A new third-party cell sometimes sits at a slightly different resting voltage at equivalent charge states, which causes the camera to misread capacity and trigger the low-battery warning early. This is a calibration gap, not a faulty cell. Running one full charge-to-cutoff cycle inside the camera body re-anchors the threshold mapping and clears the false warning.

Battery percentage jumping erratically during a shoot

On the FZ1, the battery percentage display updates by comparing live cell voltage against stored threshold points. When the camera's stored curve doesn't yet match the new cell's actual discharge profile, the indicator skips or drops several percentage points under brief high-draw events — zoom motor activation, flash charge cycles, or optical image stabilisation bursts. The voltage itself is stable; it's the mapping that's off. After two to three full discharge-and-recharge cycles, the readings settle and track the actual cell state accurately.