Rollei Compactline 83 Replacement Battery 3.7V 900mAh

Rollei Compactline 83 — 3.7V Li-ion Replacement Battery

This 3.7V, 900mAh lithium-ion cell replaces the original battery in the Rollei Compactline 83 compact digital camera. It measures 53.00 x 34.00 x 4.80mm and fits the battery compartment without modification. Voltage and capacity match the original spec exactly.

• Compactline 83 fit: The Compactline 83 uses a slim single-cell Li-ion pack at 3.7V nominal. This cell matches that voltage rail and the physical dimensions of the OEM unit, so the door closes and the camera powers on without issue.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the Compactline 83 platform. The BMS held within safe cutoff thresholds at both ends of the curve, and the camera recognised the battery without error flags on each test cycle.
• First-use calibration on the Compactline 83: Run one full discharge to camera shutoff, then charge uninterrupted to 100% before your first shoot. The Compactline 83's fuel gauge IC calibrates against the cell's actual discharge curve on that first cycle — skipping it means the percentage indicator can read several points off for weeks.

Why the Compactline 83 shuts down before the battery indicator hits zero

A fresh replacement cell has a slightly different internal resistance profile than the worn cell the camera's fuel gauge was calibrated against. Under the load spike of writing a photo to the card or firing the flash, the cell voltage briefly sags below the camera's cutoff threshold even though the displayed percentage still shows charge remaining. The BMS reads that sag as a low-voltage event and cuts power to protect the cell. One full discharge-charge cycle recalibrates the fuel gauge IC to the new cell's actual voltage curve and eliminates most premature shutdowns.

Battery percentage jumping erratically after installation

Erratic percentage readings — jumping from 60% to 80% or dropping suddenly — happen because the fuel gauge IC still holds the learned curve from the old, degraded cell. The new cell has a steeper, cleaner discharge curve that the IC has not yet mapped. Drain the camera fully until it powers off, then charge it to 100% in one uninterrupted session. After that single calibration cycle, the percentage display stabilises and tracks the actual cell state accurately.