Leica V-Lux 20 Replacement Battery BP-DC7 3.7V 890mAh

Leica V-Lux 20 — 3.7V Li-ion Replacement Battery (BP-DC7)

This 3.7V 890mAh Li-ion battery replaces the OEM BP-DC7 cell in the Leica V-Lux 20 compact digital camera. It powers the imaging sensor, lens drive motor, and onboard processing during stills and video. Dimensions are 41.60 × 30.40 × 9.40mm — a direct physical match to the original cell bay.

• V-Lux 20 compatibility: The V-Lux 20 uses a single-cell 3.7V Li-ion pack with a three-contact connector carrying data, positive, and ground. This cell matches that connector layout and voltage rail, so the camera body reads charge state correctly once the BMS handshake completes.
• Bench tested on actual hardware: We ran this cell through a full charge-discharge cycle on the V-Lux 20 body. The BMS accepted the cell without error codes, and the battery-remaining indicator tracked normally across the discharge curve.
• First-use charge cycle on V-Lux 20: Charge this cell fully via the OEM charger or directly in the camera body before your first shoot. The V-Lux 20 BMS maps its battery-remaining display against a reference discharge curve — one complete charge cycle from within the body lets it calibrate that mapping accurately on a new cell.

Battery percentage jumping on the V-Lux 20 display with a new cell

The V-Lux 20 estimates remaining charge by measuring cell voltage against a stored discharge curve. A new Li-ion cell has a slightly different voltage profile than a well-used OEM cell, so the camera's indicator can misread it — showing jumps or sudden drops early in the discharge. This is a calibration issue, not a cell fault. One full charge-to-empty cycle inside the camera body re-anchors the indicator to the new cell's actual curve.

V-Lux 20 showing dead battery on a partially charged replacement cell

If the camera shuts down and displays the dead-battery icon while the replacement cell still holds a charge, the BMS has hit its low-voltage cutoff before the cell is actually empty. This happens when the cell rests at a lower open-circuit voltage than the camera expects — common on a new cell that has never been fully charged. Charge the cell completely in the OEM charger, then re-insert it. After a full charge cycle, open-circuit voltage should read at or above 4.1V, and the camera's cutoff trigger will align with actual depletion.