About this replacement
Medion MD96350 / MD96370 Series — 11.1V Li-ion Replacement Battery (BTP-BVBM)
This is an 11.1V Li-ion battery rated at 6600mAh (73.26Wh), built to replace the original cell in the Medion MD96350, MD96370, WIM2140, MD96850, and over 30 additional Medion notebook models. OEM part numbers covered include BTP-BVBM, BTP-BWBM, BTP-CHBM, BTP-CPBM, and 40022954 among others. If your original part number matches this list, this cell slots in as a direct swap.
- MD96350 and related models: These Medion notebooks share a common 11.1V three-cell rail, identical connector pinout, and the same BMS handshake protocol across the BTP-Bx BM family — which is why one cell covers the full range without modification.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on a Medion notebook platform. The BMS completed charge handshake without fault codes, and the protection circuit triggered correctly at low-voltage cutoff with no false trips during mid-cycle load.
- Post-install calibration on Medion notebooks: After fitting this cell, 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 in most Medion BIOS screens following any cell swap.
BIOS reporting battery health as poor after replacing the MD96350 cell
Medion notebooks store battery health data in EEPROM on the old cell. When a new cell goes in, the BIOS reads no prior cycle history and flags the battery as degraded or unknown — even when the cell is brand new. This is a firmware read issue, not a hardware fault. Running a full discharge-to-hibernate followed by a complete uninterrupted charge gives the BIOS enough data to rebuild its battery profile. After one or two full cycles, the health status corrects itself without any driver changes.
Laptop shuts down suddenly while the gauge still shows 20–30% remaining
This happens when the fuel gauge IC has not yet calibrated against the new cell's actual discharge curve. The gauge carries over voltage-to-capacity mapping from the old cell, which typically had a steeper voltage cliff at low charge. Under combined CPU and display load, voltage drops faster than the gauge expects, and the BMS trips the cutoff before the displayed percentage reaches zero. Let the battery discharge fully to hibernate on each of the first three cycles — this allows the fuel gauge IC to re-map the new cell's curve. After three full cycles the reported percentage and actual cutoff point align within a few percent.