Medion MD42200 Replacement Battery 14.4V 4400mAh BTP-89BM
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Medion MD42200 Replacement Battery 14.4V 4400mAh BTP-89BM - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
Battery Care Tips
🔹 Getting Started
Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.
🔹 Keep It Healthy
Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.
Delivery and Shipping
Delivery and Shipping
🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.
Disclaimer
Disclaimer
⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.
🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Medion MD42200 Replacement Battery 14.4V 4400mAh BTP-89BM - is backordered and will ship as soon as it is back in stock.
Voltage
14.4V
Amp
4400mAh
Medion MD42200 — 14.4V Li-ion Replacement Battery (BTP-89BM)
This is a 14.4V Li-ion battery rated at 4400mAh (63.36Wh), built to the same spec as the original BTP-89BM cell. It fits the Medion MD42200 notebook. The connector and BMS handshake match the MD42200 motherboard exactly — no adapter or modification needed.
- MD42200 platform fit: The MD42200 uses a 14.4V four-cell series configuration with a specific BMS communication protocol. This cell matches that voltage rail, physical connector, and BMS handshake so the laptop recognises it correctly at first boot.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on an MD42200 board. The BMS accepted the cell without error flags, charge current ramped correctly through CC/CV stages, and the fuel gauge IC registered the full 4400mAh rated capacity after two calibration cycles.
- First-cycle reset on the MD42200: After fitting this cell, run one full discharge down to hibernate cutoff, then charge uninterrupted to 100% without unplugging. This resets the BIOS battery learn cycle and clears the inaccurate health warning the MD42200 displays after every cell swap.
Why the MD42200 BIOS reports poor battery health after a cell swap
The MD42200 BIOS stores learned capacity data from the previous cell in EEPROM. When a new cell is fitted, that stored data no longer matches actual cell behaviour, so the BIOS flags health as poor or unknown. This is not a fault with the replacement cell — it is stale EEPROM data. Run one full discharge-to-hibernate followed by an uninterrupted full charge. The BIOS relearns capacity from the new cell and the health warning clears.
MD42200 shutting down suddenly with 20–30% charge still shown
This happens when the fuel gauge IC has not yet calibrated against the new cell's voltage curve. The displayed percentage is based on old data, so the laptop shuts down when the actual cell voltage drops below the hardware cutoff — typically around 11.0V under full CPU and display load. The gauge needs two to three full discharge and charge cycles before readings become accurate. Complete those cycles without partial charges to let the IC map the new cell correctly.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Medion
- Manufacturer: CS
- Series: Standard
- Color: Grey
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
The MD42200 BIOS is showing the new battery as "0%" or "unknown" — is the cell dead out of the box?
It is not dead — the BIOS is reading stale capacity data stored in EEPROM from the old cell. The new cell's state of charge does not match that stored profile, so the BIOS cannot resolve a percentage. Plug in the AC adapter and let the battery charge uninterrupted to 100%, then run it down fully to hibernate cutoff. After one complete cycle the BIOS relearns from the new cell and the reading normalises.
Windows is showing this battery as 63Wh but the system info screen says a different Wh rating — which is correct?
The figure shown in system info is pulled from the EEPROM on the original cell, which the MD42200 caches even after a swap. The actual rated capacity of this replacement is 63.36Wh at 14.4V and 4400mAh — that is the authoritative spec. After one full BIOS learn cycle the reported Wh figure will update to reflect the new cell's data rather than the cached value from the old one.
The fuel gauge on the MD42200 is jumping around — showing 60%, then 45%, then 70% within minutes. What is happening?
The fuel gauge IC is calibrating against the new cell's voltage curve and has not yet built an accurate discharge map. Until it completes two to three full cycles, readings will be erratic. Avoid partial charges during this period — run the battery from full charge down to hibernate cutoff each time. By the third full cycle the gauge IC will have enough data to track the new cell accurately and the readings will stabilise.
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