Rollei Movieline SD-10 Compatible Battery 3.7V 1800mAh

Rollei Movieline SD-10 / Powerflex 350 WiFi — 3.7V Li-ion Replacement Battery

This 3.7V, 1800mAh Li-ion cell replaces the original battery in the Rollei Movieline SD-10 and Powerflex 350 WiFi compact camcorders. Both models share the same 53.00 × 35.30 × 11.00mm form factor and single-cell 3.7V power rail. Slot it into the OEM battery bay and it connects directly to the existing contacts.

• Movieline SD-10 and Powerflex 350 WiFi compatibility: Both camcorders draw from an identical 3.7V single-cell architecture with matching physical dimensions and contact layout. One cell fits both without modification.
• Bench tested on actual hardware: We cycled this cell through the Movieline SD-10's charge circuit and confirmed the BMS accepted the cell, completed a full charge, and passed protection-cutoff checks at both high-voltage and low-voltage thresholds.
• First-cycle conditioning on camcorder BMS: Run the first full charge through the camcorder body itself, not a universal third-party charger. The Movieline SD-10's onboard charge controller needs to complete one full charge cycle internally before the battery-level indicator reads accurately during recording and playback.

Why the Movieline SD-10 shows a dead battery indicator on a new replacement cell

The SD-10 maps battery remaining using a voltage-threshold table calibrated to the original cell's discharge curve. A new replacement cell at resting voltage can sit outside the expected range the firmware considers "charged," triggering the low-battery icon even when the cell is at 3.9V or above. The fix is to place the cell in the camcorder and run a full charge via the OEM power adapter. After one complete charge cycle through the body, the threshold mapping resets and the indicator tracks correctly.

Battery percentage jumping erratically during recording on the SD-10

This happens when the camcorder's voltage-based fuel gauge samples the cell mid-draw during recording. The sensor, codec processor, and LCD backlight pull simultaneously, causing a momentary voltage sag that the firmware reads as a sharp capacity drop. The indicator then recovers when the draw stabilises, producing the jumping readout. It is a display artefact, not a cell fault. If the behaviour persists after two full charge cycles through the camcorder body, check that the battery contacts are clean and seated — oxidation on the contact pins increases resistance and amplifies the voltage sag the firmware sees.