Rollei Compactline 83 Compatible Battery 3.7V 750mAh

Rollei Compactline 83 — 3.7V Li-ion Replacement Battery

This 3.7V 750mAh (2.78Wh) lithium-ion cell replaces the factory battery in the Rollei Compactline 83 compact digital camera. It powers the image sensor, LCD display, and onboard processing circuitry. Swap it in when the original cell no longer holds a usable charge.

• Compactline 83 fit: The Compactline 83 uses a slim single-cell Li-ion pack at 3.7V nominal. This cell matches the original voltage rail and physical dimensions (53.00 × 34.00 × 4.80mm), so the battery door closes and the contacts seat correctly.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on the bench. The protection circuit responded correctly to over-discharge and over-current conditions, and the camera's charge indicator cleared on a standard cycle.
• Storage before a shoot: If the camera has been sitting unused for several months, charge the battery fully before heading out — compact camera charge controllers do not always flag a partially depleted cell accurately after long idle periods.

Why the Compactline 83 shuts off mid-use with charge still showing

The camera's fuel gauge reads the cell's open-circuit voltage, not actual remaining capacity. A degraded or new uncalibrated cell can show 40% charge, then drop below the 3.0V cutoff threshold the moment the LCD backlight and image processor load the circuit simultaneously. This is a voltage cliff — the cell cannot sustain current under combined load even though resting voltage appears fine. One full discharge-to-cutoff and full recharge cycle recalibrates the gauge against the new cell's actual discharge curve.

Camera won't power on after the replacement battery was left uncharged in storage

Li-ion cells discharged below approximately 2.5V trigger the protection circuit's lockout state — the BMS disconnects the cell to prevent damage, and the camera sees zero voltage at the contacts. A standard charger may not recover a locked-out cell because it waits for a minimum voltage signal before starting charge current. Connect the battery to a charger that supports a low-voltage recovery or trickle pre-charge mode. Once the cell recovers to around 3.0V, normal charging resumes.