Minox DCC 5.0 Compatible Battery 3.7V 900mAh Li-ion

Minox DCC 5.0 / DCC 5.1 — 3.7V Li-ion Replacement Battery

This is a 3.7V, 900mAh Li-ion replacement battery for the Minox DCC 5.0 and DCC 5.1 compact digital cameras. It fits both the DCC 5.0 and the Digital Classic DCC 5.1 variants. Capacity figure is taken directly from the product specification: 900mAh (3.33Wh).

• DCC 5.0 and DCC 5.1 compatibility: Both camera variants share the same battery bay dimensions and 3.7V single-cell voltage rail. The cell footprint — 46.20 × 34.14 × 5.68mm — matches the original bay without modification. No adapter or wiring change needed.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on a DCC 5.1 body. The BMS held charge termination correctly and showed no anomalous voltage drop during playback load. Cell voltage at rest after a full charge measured 4.18V.
• First-use calibration on the DCC 5.0: The DCC 5.0 fuel gauge IC is calibrated to the original cell's discharge curve. On first install, run one complete discharge-to-charge cycle with the LCD active to push the gauge through its full range — this anchors the percentage display to the new cell's actual curve before you rely on the indicator in the field.

Why the DCC 5.0 shows the wrong battery percentage after a cell swap

The DCC 5.0 uses a coulomb-counting fuel gauge IC that tracks charge based on the original cell's known capacity and impedance profile. Drop in a new cell and the IC still references the old curve — so displayed percentage drifts from actual charge state almost immediately. The fix is a single full discharge-charge cycle with the camera in active use, not sitting idle. After that cycle the IC resets its internal state-of-charge estimate against the new cell, and percentage readings stabilise.

Camera shuts off suddenly while the percentage still shows 20–30%

This is a voltage-cliff failure, not a capacity problem. When the cell cannot sustain voltage under the load of the LCD and image processor firing simultaneously, terminal voltage drops below the BMS cutoff threshold even though the fuel gauge still estimates charge remaining. It happens most often on cells that have never been fully calibrated after installation. Run the camera down to automatic shutdown once, then charge fully to 4.2V — this gives the fuel gauge enough data to place the cutoff warning accurately against the new cell's actual discharge curve.