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Lenovo ThinkPad X1 3rd Replacement Battery 01AV454 7.72V 5050mAh

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From $87.99 USD $108.99
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Fits Lenovo ThinkPad X1 3rd generation tablet, replaces OEM part numbers 01AV454, 5B10W13919, L16L4P91, L16M4P91, L16S4P91, SB10K97599, SB10T83162.
Delivers 7.72V and 5050mAh capacity, restoring full charge cycles to tablets showing rapid drain or shutdown at mid-battery levels.
Uses proprietary Lenovo connector with single-pin orientation and friction lock — seat firmly until the latch clicks.
We bench-tested this cell in the X1 3rd dock; the BMS accepted the new pack on first insertion and charged to full capacity without fault codes.
After installation, run one complete discharge to automatic shutoff then charge uninterrupted to 100% to recalibrate the fuel gauge IC against the new cell.
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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.

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: 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

7.72V

Amp

5050mAh

Lenovo ThinkPad X1 3rd Gen Tablet — 7.72V Li-Polymer Replacement Battery (01AV454)

This 7.72V, 5050mAh (38.99Wh) Li-Polymer battery replaces the original pack in the Lenovo ThinkPad X1 3rd generation tablet. It matches the OEM voltage rail, connector, and BMS handshake required by this device. Fits models using part numbers 01AV454, L16L4P91, L16M4P91, L16S4P91, SB10K97599, SB10T83162, and 5B10W13919.

  • ThinkPad X1 3rd Gen platform fit: All variants of the X1 3rd Gen tablet share the same 7.72V two-cell Li-Polymer pack, connector pinout, and BMS communication protocol. Swapping to a different voltage or connector layout will trigger an immediate BMS rejection at boot.
  • Bench tested on actual hardware: We ran this cell on a ThinkPad X1 3rd Gen unit and confirmed the BMS handshake completed without error codes, charge current ramped correctly through the CC/CV stages, and no cell-mismatch flags appeared in the Lenovo power management interface.
  • Fuel gauge recalibration after swap: After installing this battery, run one full discharge to automatic shutoff, then charge uninterrupted to 100% without using the device. This resets the fuel gauge IC calibration against the new cell and clears the inaccurate percentage readings that typically appear in the first few cycles after a replacement.

ThinkPad X1 tablet shutting down at 15–25% remaining

The X1 3rd Gen runs a high-resolution display alongside simultaneous WiFi and LTE activity, which creates a combined load spike that can pull the cell voltage below the BMS cutoff threshold before the reported percentage reaches zero. The fuel gauge IC maps voltage to percentage using a discharge curve calibrated to the old cell — a new cell with a different internal resistance will cause the curve to misalign. The BMS then cuts power at what the software still reads as 15–25%. One full uninterrupted discharge-to-shutoff cycle followed by a full charge resets that curve and resolves the early cutoff.

Fast charging not available after battery swap on the X1 tablet

The ThinkPad X1 3rd Gen uses USB-PD negotiation to unlock higher charge rates — the charge IC and BMS must complete one accepted charge cycle on the new cell before the firmware permits full USB-PD current. On a fresh install, the system defaults to a conservative charge rate as a safety measure. Plug into the original Lenovo USB-PD adapter, let the battery charge fully without interruption, and fast charging will be available from the next session. Using a third-party or low-wattage adapter for that first cycle will delay this unlock.

Compatible Models

ThinkPad X1 3rd

Replaces Part Numbers

01AV454 5B10W13919 L16L4P91 L16M4P91 L16S4P91 SB10K97599 SB10T83162

Technical Specifications

Voltage7.72V
Amp Hours5050mAh
Capacity5050mAh
Rate38.99Wh
Net Weight200.2g /7.06 oz
Gross Weight460.2g /16.23 oz
Approximate Weight460.2g /16.23 oz
Dimension 249.62 x 97.80 x 4.50mm

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

My ThinkPad X1 tablet shows 80% charge right after I installed the new battery — is the percentage wrong?

Yes, the fuel gauge IC is still calibrated to the discharge curve of the old cell. A new Li-Polymer pack has different internal resistance, so the voltage-to-percentage mapping is off from the start. Run the tablet down to automatic shutoff on battery power, then charge it uninterrupted to 100% using the Lenovo adapter. That single full cycle recalibrates the gauge and the reported percentage will track correctly afterward.

The tablet cuts off completely at around 20% after the battery replacement — what's causing that?

Under combined display and WiFi load, the X1 3rd Gen pulls enough current to drop cell voltage below the BMS low-voltage cutoff before the fuel gauge reaches 0%. The BMS is working correctly — it's the percentage display that's wrong, not the hardware. The fuel gauge curve needs to be reset against the new cell. Do one full discharge to automatic shutoff followed by a full uninterrupted charge to 100%; the early shutoff will stop after that calibration cycle.

The tablet feels warm near the charging port while the new battery is filling up — should I be concerned?

Mild warmth during the first few charge cycles on a new Li-Polymer cell is normal. The charge IC runs a conditioning pass on an unfamiliar cell, which keeps current in the constant-current phase slightly longer than usual and generates a small amount of additional heat. If the surface temperature stays below what you'd call hot to the touch and the device isn't throttling performance, no action is needed. If it becomes hot or the charge stops early, check that you're using the correct Lenovo USB-PD adapter rated for the X1 tablet.

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Lenovo ThinkPad X1 3rd Replacement Battery, 7.72V, 5050mAh, Li-Polymer 1

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