Prestigio MultiPhone 5504 DUO 3.7V Replacement Battery 1750mAh

Prestigio MultiPhone 5504 DUO — 3.7V Li-ion Replacement Battery (PSP5504 DUO)

This 3.7V, 1750mAh Li-ion cell is a direct replacement for the Prestigio MultiPhone 5504 DUO. It fits the dual-SIM smartphone and matches the original battery's voltage and connector spec. Capacity is 1750mAh (6.48Wh) — use the product data figure, not third-party listings.

• MultiPhone 5504 DUO compatibility: The 5504 DUO runs dual active SIM slots, which draws from a single 3.7V cell. This replacement matches that voltage rail and the physical form factor so the battery seats correctly against the contact pads without forcing the rear cover.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the 5504 DUO platform. The BMS accepted charge current without entering lockout, and the protection circuit tripped correctly at the low-voltage cutoff threshold during deep discharge simulation.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging if your charger supports it and run one full discharge-charge cycle at standard current. This lets the fuel gauge IC map the new cell's discharge curve before it starts reporting percentage to the OS — skipping this step causes erratic percentage readings for the first several days.

Sudden shutdown at 20–30% on the MultiPhone 5504 DUO

The 5504 DUO runs two SIM modems simultaneously, and both can spike current draw at the same time — during an incoming call on SIM1 while SIM2 is polling the network, for example. A new cell with a slightly higher internal impedance than the original will hit a voltage sag that crosses the BMS undervoltage threshold even though the coulomb counter still shows 20–30% remaining. The phone reads percentage from the fuel gauge IC, not from live cell voltage, so the shutdown appears without warning. Run the first full discharge cycle under light load — screen on but no active calls — so the fuel gauge IC captures the new cell's actual voltage curve before dual-modem load starts stressing it.

OS percentage stuck at 0% or jumping erratically after cell swap

The fuel gauge IC in the 5504 DUO stores a learned discharge curve from the old cell. When a new cell goes in, that stored curve no longer matches real cell behaviour, so the IC reports nonsense — percentage stuck at 0%, jumping from 15% to 60%, or refusing to move for long stretches. The fix is one complete discharge from 100% down to automatic shutdown, followed by an uninterrupted charge to 100%. After that single cycle, the IC resets its coulomb counter reference and percentage tracking normalises. If readings remain erratic after two full cycles, check that the battery connector is fully seated — a loose contact introduces resistance that the IC misreads as a depleted cell.