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Lenovo ThinkPad X230s 45N1116 Replacement Battery 11.1V 2100mAh

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From $70.99 USD $87.99
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Fits Lenovo ThinkPad X230s and X240s ultrabooks; replaces OEM part 45N1116 or 45N1117.
11.1V at 2100mAh (23.31Wh) restores full charge cycles on this ultraportable without voltage sag during CPU load.
Connector slides straight into the battery slot with a single locking tab on the right edge.
We bench-tested the BMS against X230s firmware; cell accepted charge without BIOS fault codes on first insertion.
After install, run one full discharge to hibernation cutoff, then charge uninterrupted to 100%—this resets the BIOS battery learn cycle and clears inaccurate health warnings.
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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.

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🔹 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.

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⚠️ 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.

Voltage

11.1V

Amp

2100mAh

Lenovo ThinkPad X230s / X240s Ultrabook — 11.1V Li-ion Replacement Battery (45N1116)

This 11.1V, 2100mAh Li-ion battery replaces the original cell in the Lenovo ThinkPad X230s, X230s Touchscreen, X240s, and X240s Touchscreen Ultrabooks. It matches OEM part numbers 45N1116 and 45N1117. At 23.31Wh, it restores the portable power capacity lost to cycle-degraded factory cells.

  • X230s and X240s platform fit: Both the X230s and X240s series share the same 11.1V battery rail, connector pinout, and BMS handshake protocol — that is why one cell covers all four listed models, including the touchscreen variants.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on an X230s unit. The BMS communicated correctly with the BIOS, charge termination triggered at the expected voltage, and no protection cutoffs fired under normal CPU and display load.
  • First-cycle BIOS reset procedure: After fitting this cell, let the laptop discharge fully to hibernate cutoff, then charge uninterrupted to 100% without interruption. This single learn cycle resets the BIOS battery calibration and clears the inaccurate health warning that appears on almost every cell swap in this platform.

Why the ThinkPad X230s shuts down at 20–30% remaining after a battery swap

The X230s fuel gauge IC builds a discharge model against the previous cell's chemistry data stored in EEPROM. When a new cell goes in, that model is stale — it predicts a voltage floor that does not match the new cell's actual discharge curve. Under combined CPU and display load, the measured cell voltage drops faster than the old model expects, and the BIOS triggers an emergency shutdown before the actual remaining capacity is exhausted. Running one full discharge-to-hibernate followed by a full uninterrupted charge retrains the IC against the new cell. After two or three full cycles the reported percentage tracks accurately.

BIOS reporting incorrect Wh rating after fitting a new cell

The Wh value displayed in BIOS and Lenovo Vantage is read from the battery's EEPROM, not measured live. Replacement cells occasionally carry EEPROM values from a different production batch, which can show a Wh figure that does not match the 23.31Wh specification on this cell. This is a data mismatch, not a capacity fault — the actual stored energy is correct. If the wrong figure concerns you, cross-check with a full discharge cycle and monitor the real-world drain against your workload rather than relying on the BIOS readout.

Compatible Models

Thinkpad X230s Ultrabook Thinkpad X240s Ultrabook Thinkpad X230s Touchscreen Ultrabook Thinkpad X240s Touchscreen Ultrabook

Replaces Part Numbers

45N1116 45N1117

Technical Specifications

Voltage11.1V
Amp Hours2100mAh
Capacity2100mAh
Rate23.31Wh
Net Weight130.2g /4.59 oz
Gross Weight270.2g /9.53 oz
Approximate Weight270.2g /9.53 oz
Dimension 206.53 x 61.80 x 7.24mm

Product Highlights

  • Brand: Lenovo
  • 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

Why does my ThinkPad X230s show "Battery status: Poor" in the BIOS immediately after fitting a new cell?

The BIOS reads health data from the battery's EEPROM, and that data reflects the old cell's cycle count and degradation history — not the new cell's actual condition. The "Poor" flag is carried over from the previous battery's stored values, not a reading of the replacement. Run one full discharge to hibernate cutoff followed by a full uninterrupted charge to 100%. This triggers the BIOS learn cycle, overwrites the stale EEPROM health flag, and the warning clears.

The fuel gauge jumps from 60% to 15% without warning on my X240s — is the new battery faulty?

The fuel gauge IC on the X240s calibrates its discharge model against historical cell data. On a new cell, that model is mismatched, so the percentage reading can jump erratically — particularly in the mid-range where the old cell's curve diverged most sharply from the new chemistry. The cell itself is not faulty. Run two or three full discharge-to-hibernate cycles followed by full uninterrupted charges to 100%, and the IC recalibrates against the new cell's actual voltage curve. After cycle three, gauge accuracy stabilises.

My X230s new battery stops charging at 80% and never goes higher — what is causing that?

This is almost always the BIOS charge threshold setting, not a fault with the battery. Lenovo's power management firmware includes a charge limit feature — often enabled by default or toggled via Lenovo Vantage or the legacy Power Manager — that caps charging at 80% to reduce cell wear over long-term use. Open Lenovo Vantage, go to Device → Power, and check the Battery Charge Threshold settings. Disable the charge limit or set the stop-charge threshold to 100% and the battery will charge fully.

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