IBM ThinkPad X200 Replacement Battery 10.8V 4400mAh 42T4534
This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.
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IBM ThinkPad X200 Replacement Battery 10.8V 4400mAh 42T4534 - 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.
IBM ThinkPad X200 Replacement Battery 10.8V 4400mAh 42T4534 - is backordered and will ship as soon as it is back in stock.
Voltage
10.8V
Amp
4400mAh
IBM ThinkPad X200 Series — 10.8V Li-ion Replacement Battery (42T4534)
This is a 10.8V, 4400mAh (47.52Wh) Li-ion battery for the ThinkPad X200 and X200S family of business laptops. It replaces IBM OEM part numbers 42T4534, 42T4536, 42T4538, 42T4540, and related FRU/ASM variants. Physical dimensions are 207.17 × 53.24 × 22.90mm — matching the standard 6-cell bay on these models.
- ThinkPad X200 and X200S platform fit: The X200 and X200S share the same battery bay geometry, connector pinout, and BMS handshake protocol. That is why a single cell covers both variants, including the X200S 7465 and X200 7454 sub-models.
- Bench tested on actual hardware: We ran this cell on a ThinkPad X200 chassis and confirmed the BMS initialised cleanly — no fault codes, no charge inhibit flag, and BIOS accepted the pack without triggering a "battery not recognised" error.
- First-cycle calibration after install: After fitting, run the laptop on battery until it hibernates at the low-voltage cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that shows after every cell swap on ThinkPad hardware.
BIOS reporting battery health as poor immediately after replacement
ThinkPad firmware stores battery health data in EEPROM on the pack itself. When a new cell arrives, the EEPROM contains factory defaults that do not match the laptop's learned charge history. The BIOS reads those defaults, compares them against the accumulated cycle data it expects, and flags the pack as degraded. One full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS to rewrite its battery learn data against the new cell, clearing the false warning.
Laptop shutting down at 20–30% charge shown on the gauge
This is a voltage-cliff failure, not a fuel gauge error. Under combined CPU and display load, the cell voltage drops faster than the gauge IC can track — when it hits the BMS cutoff threshold (around 9.0V for a 10.8V 3S pack), the laptop shuts off even though the gauge still shows remaining capacity. The fuel gauge IC calibrates its empty-point estimate over several full cycles. Run three complete discharge-to-hibernate then full-charge cycles and check whether the shutdown point moves up toward the real empty voltage of 9.0V.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: IBM
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My ThinkPad X200 shuts down suddenly but the gauge still shows 25% — is the new battery faulty?
Not necessarily a faulty cell. Under full CPU and display load, the cell voltage drops sharply near the end of charge — when it crosses the BMS cutoff at roughly 9.0V, the laptop cuts power even though the fuel gauge IC hasn't caught up yet. The gauge IC needs several full discharge-to-hibernate and full-charge cycles to recalibrate its empty-point against the new cell chemistry. Run three complete cycles and check whether the shutdown point drops closer to the true 0% mark.
Windows and Lenovo Vantage are showing the wrong Wh rating for this battery — it says something different from 47.52Wh
The Wh figure shown in Windows and Vantage is pulled from EEPROM data stored on the battery pack, not measured live from the cell. Factory EEPROM values on replacement cells sometimes carry a rated Wh figure that differs slightly from the actual chemistry spec. This is a reporting difference, not a capacity shortfall. After two or three full calibration cycles, the fuel gauge IC updates its calculations and the displayed figure typically aligns closer to the actual 47.52Wh rating.
The ThinkPad X200 fuel gauge jumps around — showing 80%, then 45%, then 70% within minutes of unplugging
The fuel gauge IC on the X200 uses coulomb counting calibrated against the old cell's charge curve. When a new cell goes in, that curve no longer matches and the IC guesses erratically until it re-learns the discharge profile. This is not a hardware fault — it resolves through calibration. Discharge the laptop fully until it hibernates, then charge uninterrupted to 100% without using the machine; repeat this three times and the gauge IC locks onto the new cell's actual voltage curve.
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