Prestigio MultiPhone 7600 Duo Replacement Battery 3.7V 2500mAh

Prestigio MultiPhone 7600 Duo — 3.7V Li-Polymer Replacement Battery (PAP7600 DUO)

This 3.7V, 2500mAh Li-Polymer battery replaces the original cell in the Prestigio MultiPhone 7600 Duo dual-SIM Android smartphone. It fits the PAP7600 DUO battery slot directly and matches the original connector and BMS handshake. Capacity is rated at 9.25Wh, consistent with the stock specification for this model.

• MultiPhone 7600 Duo dual-SIM load: Running two active SIM cards increases modem draw significantly. This cell matches the original voltage rail and current delivery profile needed to sustain dual-SIM standby and data without triggering the BMS undervoltage cutoff under combined modem load.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the MultiPhone 7600 Duo platform. The BMS accepted the cell without error flags, and the fuel gauge IC tracked state-of-charge through a full cycle without reset events.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell.

Sudden shutdown at 20–30% on the MultiPhone 7600 Duo after a cell swap

The MultiPhone 7600 Duo's fuel gauge IC stores a learned discharge curve from the original cell. When a new cell goes in, that curve no longer matches actual cell chemistry, so the IC misreads remaining capacity. Under peak modem or screen load, actual cell voltage drops faster than the IC predicts, and the BMS trips at what the OS still displays as 20–30%. One full discharge-charge cycle without fast charging corrects the IC's reference points and eliminates most premature shutdowns.

Phone won't power on after the replacement battery sat in storage

Li-Polymer cells self-discharge during storage. If this battery was stored discharged or sat in the device for weeks without charging, the cell voltage may have dropped below 2.5V — the BMS lockout threshold that protects against cell damage. The device will not respond to a normal power-on attempt at this state. Connect to a wall charger and leave it for 20–30 minutes before pressing the power button; most BMS circuits begin a trickle recovery charge at 3.0V before releasing the lockout and allowing the phone to boot.