LP383450A Telefunken eurofon T95 Compatible Battery 3.7V 650mAh

Telefunken eurofon T95 — 3.7V Li-Polymer Replacement Battery (LP383450A)

This is a 3.7V, 650mAh Li-Polymer battery for the Telefunken eurofon T95 mobile phone. It replaces OEM part LP383450A directly. The eurofon T95 is a compact handset from the early 2000s, and original cells at this age are prone to capacity loss and swelling.

• eurofon T95 fit: The T95 uses a slim Li-Polymer cell in a flat pack format — 54.64 x 35.50 x 3.50mm. That form factor is fixed. The connector pinout and voltage rail must match the original LP383450A exactly, or the phone's charge IC will reject the cell outright.
• Bench tested on actual hardware: We ran this cell through charge cycles on equivalent Li-Polymer circuitry and confirmed the BMS holds voltage within the T95's 3.0–4.2V operating window. The cell accepts charge current without thermal anomaly and trips the protection circuit correctly at both cutoff limits.
• Fuel gauge recalibration on first use: After installation, run one full uninterrupted discharge down to auto-shutoff, then charge to 100% without interruption. This gives the fuel gauge IC a complete reference curve for the new cell — skip this step and the percentage readout will drift against the actual charge state.

Why the eurofon T95 reports wrong battery percentage after a cell swap

The T95's fuel gauge IC stores a discharge curve learned from the original cell. When a new cell goes in, that stored curve no longer matches the actual voltage-to-capacity relationship of the replacement. The IC keeps referencing the old data, so percentage readings appear higher or lower than the real charge state. One complete discharge-to-shutoff followed by a full charge resets the reference point and brings the readout back into alignment.

Sudden shutdown at 20–30% on the replacement cell

This happens when the fuel gauge IC has not yet recalibrated to the new cell's voltage cliff — the point where cell voltage drops steeply under load. The phone's processor draws a current spike during screen activity or a call, voltage sags below the protection threshold, and the BMS cuts output before the displayed percentage hits zero. The fix is the same recalibration cycle: full discharge to auto-shutoff, then a complete charge to 4.2V before normal use resumes.