Lenovo ThinkPad X280 Replacement Battery 01AV431 11.46V
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Lenovo ThinkPad X280 Replacement Battery 01AV431 11.46V - 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.
Lenovo ThinkPad X280 Replacement Battery 01AV431 11.46V - is backordered and will ship as soon as it is back in stock.
Voltage
11.46V
Amp
4050mAh
Lenovo ThinkPad X280 — 11.46V Li-Polymer Replacement Battery (01AV431)
This 11.46V, 4050mAh (46.41Wh) Li-Polymer battery replaces the original cell in the Lenovo ThinkPad X280 12.5-inch ultrabook. It covers OEM part numbers 01AV431, 01AV470, 01AV471, 01AV472, and the full L17/SB10 series. Install it when your original cell no longer holds charge or triggers a health warning in the BIOS or Windows Battery Report.
- ThinkPad X280 platform fit: All X280 variants — including 20KFA009CD, 20KFA002CD, and 20KFA01VCD — share the same 11.46V three-cell Li-Polymer architecture, connector pinout, and BMS handshake protocol. One part number covers the full production run.
- Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on an X280 unit. The BMS communicated correctly with the BIOS, reported accurate Wh data, and held stable voltage under sustained CPU and display load without triggering an unexpected cutoff.
- First-cycle reset procedure: After installing, let the laptop discharge fully until it hibernates, then charge uninterrupted to 100% without interrupting the session. This forces the ThinkPad's fuel gauge IC to re-learn the new cell's capacity curve and clears the inaccurate health warning that appears after every cell swap.
BIOS reporting battery health as poor immediately after replacement
The ThinkPad BIOS reads battery health from EEPROM data written by the original cell during its service life. A new cell arrives with factory EEPROM values that don't match the charge history the BIOS expects, so it flags the battery as degraded or unknown. This is a data mismatch — not a fault with the new cell. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% lets the fuel gauge IC rewrite accurate cycle data and clears the warning on the next boot.
Laptop shutting down at 20–30% charge shown on screen
This happens when the fuel gauge IC is still calibrated against the old, degraded cell's voltage curve. The new cell hits a voltage cliff — where cell voltage drops sharply under combined CPU and display load — at a state-of-charge that doesn't match what the OS is displaying. The system interprets the voltage drop as an emergency and cuts power before the displayed percentage reaches zero. Complete two full discharge-to-hibernate and uninterrupted full-charge cycles to recalibrate the gauge; after that, shutdown should not occur above 5% remaining.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Lenovo
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Li-Polymer
- Battery Type: Li-Polymer
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
Windows Battery Report says my new X280 battery is only 35–40Wh but the spec says 46.41Wh — is the cell faulty?
The rated Wh figure stored in the battery's EEPROM is written at the factory and reflects the cell's chemistry rating, not its current measured capacity. Windows reads that EEPROM value and separately estimates full-charge capacity based on actual charge cycles — those two numbers diverge until the fuel gauge IC completes a few calibration cycles against the new cell. Run two full discharge-to-hibernate and uninterrupted charge-to-100% sessions. After that, the reported full-charge capacity should align closely with 46.41Wh.
My X280 battery stopped charging at 80% and won't go higher — did I get a defective cell?
This is almost always the Lenovo BIOS charge threshold setting, not a cell fault. ThinkPad firmware includes a built-in charge limit that caps charging at 80% to reduce long-term cell stress — it ships enabled by default on many units and persists through a battery swap. Open Lenovo Vantage or ThinkPad Battery Gauge, navigate to Battery Charge Threshold, and set the stop-charge value to 100%. The battery will then charge to full on the next cycle.
After fitting the new battery, the fuel gauge jumps around wildly — showing 60%, then 45%, then 70% within minutes of unplugging
The fuel gauge IC in the X280 tracks cell state-of-charge using learned parameters from the previous cell. When a new cell is installed, those learned values no longer match the new chemistry curve, so the gauge overshoots and undershoots as it tries to reconcile the mismatch. This stabilises after two to three full discharge-to-hibernate and charge-to-100% cycles, which force the IC to rebuild its model against the actual cell. After the third cycle, percentage readings should track smoothly without jumping more than 2–3% between readings.
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