About this replacement
Panasonic Lumix DMC-FP8 Series — 3.7V Li-ion Replacement Battery (DMW-BCF10)
This is a 3.7V, 940mAh Li-ion cell built to replace the DMW-BCF10 in Panasonic Lumix compact cameras. It fits the DMC-FP8, FP8A, FP8G, FP8K, and over 237 additional Lumix models sharing the same battery bay and connector. Dimensions are 40.96 × 36.50 × 6.70mm — a direct physical match for the original slot.
- FP8 series and CGA-S009 platform: The DMC-FP8 variants and a wide range of Lumix compacts share the same 3.7V rail, physical form factor, and BMS handshake. That is why one cell — the DMW-BCF10 / CGA-S009 — covers all of them. Voltage tolerance and connector pinout are identical across this group.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Lumix body. The BMS accepted the cell without rejection flags, and the protection circuit responded correctly to end-of-discharge cutoff without triggering a false low-battery shutdown at partial capacity.
- First-install charge cycle on the FP8: Slot the new cell and run one full charge inside the camera body or OEM charger before shooting. The FP8's battery-remaining indicator calibrates its threshold map during that first cycle — skipping it can cause the indicator to read inaccurately for the first several uses.
Flash recycling slowing down mid-shoot on the DMC-FP8
The FP8's built-in flash draws a sharp current spike to recharge its capacitor between shots. As cell voltage drops toward the lower end of the discharge curve, that recharge current sags — the capacitor takes longer to reach full charge. You will notice this as a longer wait between flash-ready confirmations. It is not a camera fault. It is the cell voltage falling below the point where the capacitor circuit pulls peak current efficiently. Swap or charge the battery when flash recycle lag becomes consistent.
Battery percentage jumping erratically on the display
The FP8 maps battery percentage using a voltage-threshold table tuned to the original cell's discharge curve. A new replacement cell may have a slightly different curve shape — the camera reads voltage correctly but translates it to the wrong percentage step. This is most visible between 40% and 70% displayed charge, where the curve is flattest. After two or three full charge and discharge cycles, the indicator typically stabilises as the cell's curve settles within the expected range. If it remains erratic after three cycles, check that resting voltage after a full charge sits at or above 4.1V.