Orange Lisbon 3.7V Replacement Battery Li3707T42P3h463848 550mAh

Orange Lisbon — 3.7V Li-ion Replacement Battery (Li3707T42P3h463848)

This is a 3.7V Li-ion cell rated at 550mAh (2.04Wh), built to the same form factor as the original Orange Lisbon battery. It fits the Orange Lisbon smartphone directly, using the OEM part number Li3707T42P3h463848 as the reference spec. Physical dimensions are 45.41 × 37.32 × 4.22mm — confirm clearance before fitting.

• Orange Lisbon compatibility: The Lisbon uses a compact single-cell 3.7V pack with a low-current BMS matched to its modest processor and modem draw. This replacement matches that voltage rail and connector pinout, so the charge IC on the mainboard sees the correct cell parameters on first boot.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench, monitoring BMS handshake and cutoff behaviour. The protection circuit triggers correctly at the low-voltage threshold and does not false-trip under normal screen and modem load.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging if available and run one complete discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before reporting percentage to the OS — skipping this step causes erratic readings for the first several cycles.

Why the Lisbon reports wrong battery percentage after a cell swap

The fuel gauge IC on the Lisbon mainboard holds a learned model of the old cell's voltage-to-capacity curve in memory. When a new cell goes in, that stored model no longer matches the actual discharge profile of the fresh cell. The OS reads percentage from the fuel gauge, not directly from cell voltage, so it inherits the error. One full discharge down to automatic shutdown followed by a complete charge resets the coulomb counter and forces the IC to re-learn against the new cell.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops sharply under load — a voltage cliff — even though the reported percentage looks safe. At 20–30% state of charge, the cell's internal resistance causes voltage to sag below the modem's minimum supply rail the moment a call or data burst fires. The phone shuts down to protect the SoC, not because the BMS triggered. Let the phone sit off for two minutes after shutdown, then power it back on — if it boots to 15–20%, the fuel gauge was over-reading and needs a full recalibration cycle from 100% charge down to automatic cutoff.