About this replacement
Medion MD95500 / MD95292 — 14.8V Li-ion Replacement Battery (LI4403A)
This is a 14.8V, 4400mAh (65.12Wh) Li-ion battery for the Medion MD95500, MD95292, RAM2010, RIM2000, and related notebooks. It replaces OEM part numbers LI4403A, 40010871, and W81148LA. The connector and BMS handshake match the original cell, so the laptop recognises it without driver changes.
- MD95500 / MD95292 platform fit: These models share the same 14.8V four-cell battery bay, connector pinout, and SMBus communication lines. Any cell meeting those three parameters will register correctly with the EC and charge controller.
- Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on an MD95500. The BMS held communication with the EC throughout, charge termination triggered cleanly at 100%, and the protection circuit responded correctly to a simulated overcurrent event.
- Post-install calibration for MD-series notebooks: After fitting this battery, run the laptop on battery alone until it hibernates from low charge, then plug in and charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears after every cell swap on this platform.
BIOS reporting poor battery health immediately after fitting a new cell
The MD95500's BIOS reads health data stored in the battery's EEPROM. That data reflects the previous cell's wear history, not the new cell's actual condition. Until the BIOS runs a full learn cycle, it keeps displaying the old health figure. One complete discharge-to-hibernate followed by an uninterrupted charge to 100% rewrites the learned data. After that cycle, the health indicator reflects the current cell accurately.
Laptop shuts down abruptly at 25–30% charge shown
This happens when the fuel gauge IC has not yet calibrated against the new cell's voltage curve. The IC still uses the old cell's discharge profile, so it miscalculates the remaining capacity and triggers shutdown before the real reserve is used. It is not a faulty cell. Run two or three full discharge-to-hibernate cycles without interruption. By the third cycle the fuel gauge IC tracks the new chemistry accurately and the phantom shutdowns stop. Confirm the cell voltage at hibernation cutoff reads between 10.8V and 11.2V across the pack.