Medion MDPNA 15000 Replacement Battery 3.7V 1250mAh

Medion MDPNA 15000 / MD96700 Series — 3.7V Li-ion Replacement Battery

This 3.7V 1250mAh Li-ion battery fits the Medion MDPNA 15000, MD95762, MD96700, and MD96710 smartphones. It is a direct cell replacement when the original battery no longer holds a charge or has physically swollen. Capacity is 1250mAh (4.63Wh) — matching the original cell specification.

• MDPNA 15000 / MD96700 platform fit: These four Medion models share the same battery bay dimensions (53.44 × 37.14 × 7.66mm), connector pinout, and BMS communication protocol — so one cell fits across the group without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the MD96700 platform. The BMS accepted the cell on first insertion, completed a full charge cycle without thermal event, and voltage held steady at 3.7V nominal under screen and modem load.
• Fuel gauge recalibration on first use: Disable any fast-charge mode for the first complete discharge-charge cycle after installation. This gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging begins on an uncalibrated cell.

Sudden shutdown at 20–30% on the replacement cell

A new Li-ion cell has a steeper voltage drop near the low end of its discharge curve compared to a used cell the fuel gauge IC was originally calibrated against. The phone's SoC interprets this voltage cliff as a fault and cuts power to protect the modem and storage. This is not a defective cell — it is a calibration mismatch. Run one full uninterrupted discharge to 0% shutdown, then charge to 100% without interruption; the fuel gauge IC will re-anchor its curve and the cutoff will move back to the correct low-voltage threshold near 3.4V per cell.

Phone reports wrong battery percentage after cell swap

The fuel gauge IC stores a learned discharge profile from the old cell in its coulomb counter registers. After a cell swap, those stored values no longer match the new cell's actual capacity, so the percentage readout drifts — often reading 100% within minutes of charging or dropping suddenly from 60% to 15%. One full discharge-charge cycle rewrites the coulomb counter baseline against the new cell. After that cycle, percentage reporting stabilises to within the normal ±3–5% tolerance of the IC.