Medion SB-L110 Camera Replacement Battery 7.4V 1400mAh

Medion MD9021 / MD9035 Series — 7.4V Li-ion Replacement Battery (SB-L110)

This is a 7.4V, 1400mAh Li-ion cell built to the SB-L110 specification for Medion digital cameras. It fits the MD9021, MD9021n, MD9035, MD9035n, and compatible variants in the same series. Voltage and capacity match OEM figures drawn from the product data — not approximated.

• MD9021 and MD9035 platform fit: These models share the same battery bay geometry, contact layout, and 7.4V supply rail. One cell format covers both, including the "n" suffix variants, because the BMS handshake and connector pinout are identical across that production run.
• Bench tested on actual hardware: We cycled this cell through the MD9021 body and an OEM-compatible charger. The BMS accepted the cell without fault codes, held charge termination at the correct voltage, and showed stable draw across still capture and video recording modes.
• First-install charge cycle on the MD9021: Seat the new cell in the camera body and run one full charge through the camera's own charging circuit before shooting. Some Medion BMS firmware calibrates the battery-remaining indicator against the first charge cycle it records — skipping this can cause the display to read inaccurately from the first session onward.

Flash recycling lag on a new SB-L110 cell

The MD9021's built-in flash draws a sharp current spike to recharge its capacitor between shots. A new cell that hasn't completed a full charge cycle can show slightly elevated internal resistance in the first few uses, which causes the capacitor to recharge more slowly than expected. This shows up as a longer-than-normal ready indicator delay between flash frames. After two or three full charge-discharge cycles, internal resistance drops and recycling speed normalises. If lag persists beyond that, check the cell is reaching a full 8.4V at charge termination.

Battery percentage jumping erratically on the MD9021 display

The MD9021 maps its battery indicator against a fixed voltage-threshold curve calibrated to the original cell's discharge profile. A replacement cell with a slightly different discharge curve hits those thresholds at different points, so the indicator can jump — for example, from 60% to 30% with no heavy use in between. This is a display calibration issue, not a cell fault. Running two full charge-discharge cycles in the camera body allows the BMS to re-map its readings against the actual discharge curve of the new cell. After that, the percentage steps should track more evenly across the discharge range.