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Lenovo ThinkPad P1 2019 Replacement Battery 15.4V 5000mAh

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From $86.99 USD $106.99
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Fits ThinkPad P1 2019 20QTA00PCD and replaces Lenovo OEM part 01YU911.
This 15.4V 5000mAh Li-Polymer cell delivers full voltage under sustained CPU and display load.
Connector seats flush into the battery slot; locking tab engages with a soft click.
We ran full discharge cycles and confirmed the BMS voltage curve held steady without sag.
After installation, run one complete discharge to hibernation then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap.
Delivery time

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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Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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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.

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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

15.4V

Amp

5000mAh

Lenovo ThinkPad P1 2019 — 15.4V Li-Polymer Replacement Battery (01YU911)

This 15.4V, 5000mAh (77Wh) Li-Polymer battery replaces the original cell in the Lenovo ThinkPad P1 2019 mobile workstation. It fits multiple 20QTA-series configurations including 20QTA00PCD, 20QTA00QCD, and 20QTA00DCD. Cross-reference OEM part numbers 01YU911, L18M4P71, SB10S57317, or 5B10W13900 before ordering.

  • ThinkPad P1 2019 20QTA-series compatibility: All listed 20QTA variants share the same 15.4V four-cell battery rail, connector pinout, and BMS handshake protocol. The BIOS validates cell voltage and EEPROM data on every boot — any cell that matches the communication spec passes the handshake without firmware modification.
  • Bench tested on actual hardware: We ran this cell on a ThinkPad P1 2019 unit under sustained CPU and GPU load. The BMS held charge delivery stable through the load cycle, and the BIOS battery status screen confirmed cell recognition without errors after a full learn cycle.
  • First-cycle calibration on the ThinkPad P1: After installation, run the laptop down to automatic hibernate cutoff — do not force shutdown — then charge uninterrupted to 100%. The ThinkPad BIOS uses this discharge floor and charge ceiling to reset the battery learn cycle. Skipping this step causes the Power Manager to report inaccurate state-of-charge figures for several weeks.

BIOS reporting battery health as poor immediately after swapping the P1 cell

The ThinkPad BIOS reads health data stored in the outgoing cell's EEPROM and compares it against the new cell during POST. A fresh cell has no degradation history, but the BIOS interprets missing cycle data as an unknown or degraded state. This triggers the "Battery health: poor" warning in Lenovo Vantage and the BIOS battery information screen. Running one full discharge-to-hibernate then a complete charge to 100% gives the firmware enough data to overwrite the stale EEPROM reference and clear the warning.

ThinkPad P1 shuts down at 20–30% with new cell installed

This is a voltage cliff failure, not a capacity fault. Under combined CPU, GPU, and display load, the cell voltage drops faster than the fuel gauge IC can track — the gauge still shows 20–30% while actual cell voltage has already fallen below the BMS cutoff threshold. The BMS then trips and the laptop shuts off hard. Perform two full calibration cycles — discharge to hibernate, charge to 100% — so the fuel gauge IC maps the new cell's actual voltage-to-capacity curve. After calibration, the shutdown threshold and the displayed percentage will align at approximately 11.5V per cell group.

Compatible Models

ThinkPad P1 2019 20QTA00PCD ThinkPad P1 2019 ThinkPad P1 2019 20QTA00QCD ThinkPad P1 2019 20QTA00DCD ThinkPad P1 2019 20QTA000CD ThinkPad X1 Extreme Gen 2 ThinkPad P1 2019-20QT000RGE ThinkPad P1 2019 20QTA00FCD ThinkPad P1 2019 20QTA00ECD

Replaces Part Numbers

01YU911 01YU99 5B10W13900 L18M4P71 SB10S57317 SB10T83143

Technical Specifications

Voltage15.4V
Amp Hours5000mAh
Capacity5000mAh
Rate77Wh
Net Weight313.4g /11.05 oz
Gross Weight413.4g /14.58 oz
Approximate Weight413.4g /14.58 oz
Dimension 317.00 x 81.50 x 10.10mm

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

Lenovo Vantage is showing the wrong Wh rating after I put in the new P1 battery — is it faulty?

The Wh figure displayed in Vantage pulls from the EEPROM on the cell, not from a live measurement. A replacement cell's EEPROM may carry the rated chemistry spec rather than the exact factory-programmed value from your original Lenovo cell, which causes a mismatch in the software readout. The battery is delivering correct voltage and capacity — only the reported label differs. Run one full discharge-to-hibernate and charge-to-100% cycle; Vantage typically updates the displayed value once the fuel gauge IC has a full measurement reference.

My ThinkPad P1 fuel gauge is jumping around — showing 60%, then 45%, then back up — for the first few charges after the swap.

The fuel gauge IC on the P1's BMS calibrates itself against the charge and discharge curve of the specific cell installed. With a new cell, it has no reference curve yet, so state-of-charge estimates swing until it builds one. This is normal for the first two to three full cycles. Complete two uninterrupted full discharges to hibernate cutoff followed by full charges to 100%, and the gauge will stabilise to within a few percent of actual remaining capacity.

New P1 battery stopped charging at 80% and won't go higher — is there a fault with the cell?

This is almost always the BIOS charge threshold setting, not a cell fault. Lenovo's Power Manager and Vantage both include a conservation mode that caps charging at 80% to reduce long-term cell stress — it ships enabled on some ThinkPad configurations. Open Lenovo Vantage, go to Power → Battery, and check whether "Battery Conservation Mode" or a custom charge threshold is active. Disable conservation mode and set the upper threshold to 100% to allow a full charge.

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