PAP5500 DUO Prestigio MultiPhone Compatible Battery 3.7V 2200mAh

Prestigio MultiPhone 5500 Duo — 3.7V Li-ion Replacement Battery (PAP5500 DUO)

This 3.7V, 2200mAh Li-ion cell replaces the original battery in the Prestigio MultiPhone 5500 Duo dual-SIM smartphone. It matches the OEM part number PAP5500 DUO and fits the physical bay at 69.25 × 54.00 × 5.40mm. Capacity is rated at 8.14Wh.

• MultiPhone 5500 Duo fitment: The 5500 Duo runs two active SIM slots off a single 3.7V cell. That dual-radio load puts a higher average current draw on the battery than single-SIM devices at the same voltage — the BMS on this replacement is matched to that discharge profile.
• Bench tested on actual hardware: We cycled this cell through full discharge and recharge on the 5500 Duo platform. The BMS accepted charge handshake from the device charge IC without fault flags, and cutoff triggered cleanly at the low-voltage threshold before cell damage could occur.
• Fuel gauge recalibration after install: After fitting this cell, disable any fast-charge mode and run one complete discharge-to-charge cycle before relying on the percentage readout. The fuel gauge IC on the 5500 Duo is calibrated against the old cell's discharge curve — it needs one full cycle against the new cell to reset its coulomb counter baseline.

Sudden shutdown at 20–30% on the MultiPhone 5500 Duo

This is a voltage cliff problem, not a capacity problem. When both SIM radios are active and the screen is on, instantaneous current draw spikes hard. If the cell voltage sags below the BMS cutoff threshold under that combined load — even momentarily — the phone shuts off before the fuel gauge reads zero. The 5500 Duo's fuel gauge IC can report 25% remaining while the cell's actual under-load voltage has already dropped below 3.4V. After fitting a fresh cell, one full calibration cycle brings the reported percentage back into alignment with real cell state.

Phone won't power on after sitting in storage with a flat battery

Li-ion cells that discharge below roughly 2.5V trigger a BMS lockout to prevent cell reversal damage — the BMS will not pass current to the phone even when a charger is connected. The 5500 Duo will show no boot screen and no charge indicator in this state. Connect the phone to a wall adapter (not a PC USB port, which may not supply enough current) and leave it for 15–20 minutes without attempting to power on. Once the cell recovers above 3.0V, the BMS releases the lockout and the charge indicator appears.