Agfa Agfaphoto Optima 3 Replacement Battery 3.7V 660mAh

Agfa Agfaphoto Optima 3 Series — 3.7V Li-ion Replacement Battery

This 3.7V, 660mAh Li-ion cell replaces the original battery in the Agfaphoto Optima 3 and compatible Optima series compact digital cameras. It fits the Agfaphoto Optima 100, 102, 103, and seven additional Optima variants sharing the same battery form factor. Dimensions are 40.00 × 31.10 × 5.90mm — verify these against your original cell before installing.

• Optima series compatibility: These compact cameras share the same physical footprint, contact layout, and 3.7V nominal voltage rail across the Optima range, which is why one cell covers multiple model numbers without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on compatible hardware. The BMS accepted the cell without tripping a rejection flag, and voltage held stable across both image capture and LCD-active states.
• First-install charge cycle: Insert the cell and run a full charge through the camera body or OEM charger before shooting. Some Optima BMS implementations require this cycle to calibrate the battery-remaining indicator to the new cell's discharge curve.

Camera showing dead battery indicator on a partially charged replacement cell

The Agfaphoto Optima's battery indicator maps voltage thresholds to charge percentage using data from the previous cell's discharge history. A fresh replacement cell has a different internal resistance profile, so the camera can misread a 50–70% charge as critically low. This is not a fault with the cell. Run one complete charge-to-full cycle via the camera body, and the indicator will recalibrate to the new cell's curve.

Battery percentage jumping erratically during a shoot

Erratic percentage readings — jumping from 60% to 10% and back — point to a voltage-threshold mismatch between the camera's indicator logic and the new cell's discharge curve. The cell is delivering power normally, but the firmware is polling voltage at points that don't align with the replacement's discharge profile. A single full charge cycle from 0% to 100% through the camera body resets this mapping. After that cycle, the percentage reading should track smoothly down to 3.5V before the camera signals low battery.