Medion CIM2000 Replacement Battery 11.1V 4000mAh Li-ion

Medion CIM2000 / MD95763 — 11.1V Li-ion Replacement Battery

This is an 11.1V 4000mAh (44.4Wh) Li-ion battery for the Medion CIM2000 and MD95763 notebooks. It slots into the original battery bay and connects through the same multi-pin connector used by the factory cell. It restores full untethered operation when the original cell has degraded past usable capacity.

• CIM2000 and MD95763 fit: Both models run the same 11.1V three-cell Li-ion architecture, share the same form factor and connector pinout, and pull charge termination data from the same BIOS battery interface. One replacement cell covers both.
• Bench tested on actual hardware: We ran this cell through charge-discharge cycles on a CIM2000-class platform. The BMS accepted charge handshake correctly, current draw stayed within thermal limits at full CPU and display load, and the fuel gauge IC updated without triggering a protection cutoff.
• First-cycle reset on the CIM2000: After fitting this cell, run one full discharge down to hibernate cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to rewrite against the new cell's actual capacity and clears the inaccurate health warning that appears after every cell swap.

BIOS reporting poor battery health immediately after fitting a new cell

The BIOS on the CIM2000 reads health status from EEPROM data written during previous charge cycles. When a new cell arrives with blank or factory-default EEPROM values, the BIOS compares those figures against its stored baseline and flags the result as degraded. This is a data mismatch, not a faulty battery. Run one full discharge-to-hibernate then a complete uninterrupted charge to 100%. The learn cycle rewrites the EEPROM reference data and the health warning clears.

Notebook shuts down abruptly at 20–30% charge shown on screen

This happens when the cell voltage drops sharply under combined CPU and display load before the fuel gauge reaches its predicted cutoff point. The fuel gauge IC is still calibrated to the old cell's voltage curve, so its percentage reading drifts from the new cell's actual state-of-charge. The BMS triggers a protection cutoff at minimum safe cell voltage while the OS still shows charge remaining. Complete two to three full discharge and charge cycles so the fuel gauge IC can map its percentage thresholds against the new cell's voltage curve. After calibration, the shutdown should not occur above 5–8%.