About this replacement
Medion MD96290 / MD98300 Series — 11.1V Li-ion Replacement Battery (BTP-BXBM)
This is an 11.1V, 6600mAh (73.26Wh) Li-ion battery pack for the Medion MD96290, MD98300, WIM2160, and WAM2030 notebook series. It replaces OEM part numbers BTP-BXBM, BTP-BRBM, BTP-BSBM, BTP-BTBM, MB1X, 40022655, and 40021138. The physical connector, cell count, and BMS handshake match the original pack on these Medion platforms.
- MD96290 / MD98300 platform fit: These models share the same battery bay dimensions, three-cell-series configuration, and SMBus communication protocol, which is why one pack covers both lines. The BMS on each uses the same voltage thresholds and charge termination logic.
- Bench tested on actual hardware: We ran this pack through charge and discharge cycles on a Medion MD96290 unit. The BMS negotiated correctly with the system board, charge termination triggered at the expected 12.6V ceiling, and the protection circuit tripped cleanly at low-cell undervoltage without requiring a hard reset.
- Post-install calibration on Medion notebooks: After fitting this pack, run the laptop on battery only until it reaches hibernate cutoff — do not interrupt. Then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health or low-capacity warning that appears routinely after any cell swap on this platform.
BIOS reporting battery health as poor immediately after fitting a new pack
The Medion BIOS reads health data from an EEPROM register inside the battery's BMS, not from live cell measurements. When you swap in a new pack, the EEPROM reports factory default values that the BIOS interprets as a mismatch against its stored charge history. This triggers a "poor health" or "replace battery" flag even on a brand-new cell. One full discharge-to-hibernate followed by an uninterrupted charge to 100% allows the BIOS to rewrite its reference data and clear the flag.
Laptop shutting down abruptly at 20–30% charge shown on screen
This happens when the cell voltage drops below the BMS cutoff threshold under combined CPU and display load, even though the fuel gauge still shows charge remaining. The fuel gauge IC calibrates its state-of-charge estimate against the old cell's discharge curve, so it reads higher than the actual voltage supports. Under a full-load draw spike — screen at full brightness, CPU at sustained load — the pack voltage sags past the cutoff point before the gauge catches up. Run two full calibration cycles as described above; the fuel gauge IC recalculates against the new cell and the premature shutdowns stop.