Leica D-Lux Type 109 BP-DC15 Replacement Battery 7.4V 980mAh

Leica D-Lux Type 109 — 7.4V Li-ion Replacement Battery (BP-DC15)

This is a 7.4V, 980mAh (7.25Wh) lithium-ion replacement cell for the Leica D-Lux Type 109 compact digital camera. It slots into the same battery compartment as the original BP-DC15 and powers the camera's sensor, image processor, and LCD display. Use it as a direct swap when your original cell no longer holds a usable charge.

• D-Lux Type 109 fit: The Type 109 shares its battery platform with the Panasonic LX100 — same 7.4V rail, same physical footprint, same BMS handshake protocol. This cell meets those electrical requirements for the Leica-branded body.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on a Type 109 body. The BMS accepted the cell without error flags, voltage delivery held steady across shooting, playback, and LCD-on idle states.
• First-use charge cycle on the Type 109: Before heavy shooting, run one complete charge cycle through the camera body or OEM charger. The Type 109's BMS uses that first cycle to calibrate the battery-remaining indicator to the new cell's discharge curve — skipping it leads to inaccurate percentage readings from the start.

Battery percentage jumping around on the D-Lux Type 109 display

The Type 109 maps its battery indicator to a voltage-threshold table tuned to the original BP-DC15's discharge curve. A new third-party cell may have a slightly different curve — the camera's indicator then misreads where it sits in the discharge cycle. You'll see the percentage jump from 80% to 50% or stall at a fixed value until voltage drops into a range the camera recognises. Running two or three full charge-discharge cycles through the body corrects the mapping. After those cycles the indicator tracks the new cell accurately.

Camera shows dead battery icon on a replacement cell that just came off the charger

Some D-Lux Type 109 bodies reject a new cell on first install with a low or no battery warning — even at full charge. This is a BMS authentication check, not a faulty battery. The fix is straightforward: insert the cell, let the camera attempt to power on, then place it in the charger for a short top-up charge via the camera body's charging circuit. That handshake resets the BMS flag. After one charge cycle this way the camera powers on normally and the warning clears.