Medion MD64300 Replacement Battery 14.6V 2750mAh

Medion MD64300 — 14.6V Li-ion Replacement Battery

This 14.6V, 2750mAh (40.15Wh) Li-ion battery fits the Medion MD64300 notebook. It replaces the original cell when the laptop no longer holds a charge or fails to power on from battery. Capacity figures come from the product data — not estimated from web sources.

• MD64300 platform fit: The MD64300 uses a 14.6V four-cell Li-ion configuration. This replacement matches that voltage rail and connector pinout, so the BMS handshake completes without triggering an unknown-device error at the firmware level.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench. The BMS reported correct voltage at each stage, and charge termination triggered at the expected 16.8V ceiling without cutoff errors.
• First-cycle calibration on the MD64300: After installing, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.

BIOS reporting poor battery health immediately after installing a new cell

The MD64300 BIOS reads health data from EEPROM registers that carry over from the old cell. A fresh cell has no charge history written to those registers, so the firmware flags it as degraded before a single cycle completes. This is a firmware read error, not a fault with the new battery. Run the full discharge-to-hibernate then uninterrupted charge sequence once, and the BIOS rewrites those registers against the new cell's actual data.

Laptop shuts down at 20–30% shown on the fuel gauge

This happens when the fuel gauge IC is still calibrated to the old cell's discharge curve. The new cell hits a voltage cliff under combined CPU and display load at a point the IC still maps to 20–30% capacity. The laptop interprets that voltage drop as a critical low and cuts power. Run two full calibration cycles — discharge to hibernate-cutoff, charge to 100% each time — and the fuel gauge IC will remap its curve to the new cell's actual voltage profile.