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Lenovo ThinkPad X1 Titanium Yoga L19M4P73 Compatible Battery 7.7V 5700mAh

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Fits Lenovo ThinkPad X1 Titanium Yoga Gen 1 with OEM part numbers L19M4P73, 5B10W13965, SB10T83208.
Delivers 7.7V at 5700mAh (43.89Wh) — matches original capacity for full system runtime on CPU and display load.
Connector seats into the underside clip with positive contact pins; locking tab aligns with the hinge-side slot.
Bench test confirmed stable voltage curve under mixed AC adapter and battery load; BMS calibration cycle completed without fault signals.
After installation, power down fully to sleep mode, then run one complete discharge cycle to system shutdown, followed by uninterrupted charge to 100% — this resets the BIOS battery learn cycle and clears inaccurate health warnings that appear after cell swaps on Lenovo firmware.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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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⚠️ 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

7.7V

Amp

5700mAh

Lenovo ThinkPad X1 Titanium Yoga Gen 1 — 7.7V Li-Polymer Replacement Battery (L19M4P73)

This 7.7V, 5700mAh (43.89Wh) Li-Polymer cell replaces the L19M4P73 battery in the ThinkPad X1 Titanium Yoga Gen 1 series. It fits the 20QA001QPB, 20QA001RMH, 20QA000LUS, and related Gen 1 variants. The cell matches the original connector layout and BMS handshake protocol for this chassis.

  • Gen 1 chassis compatibility: All ThinkPad X1 Titanium Yoga Gen 1 units share the same 7.7V power rail, matching connector footprint, and EEPROM-based BMS communication — that is why one cell covers the full 20QA sub-model range listed above.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Gen 1 unit, verified BMS handshake completion, and confirmed the fuel gauge IC received valid cell data without tripping a protection cutoff.
  • Post-install calibration on the X1 Titanium Yoga: After fitting, run one full discharge until the laptop hibernates on low-battery cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears in Lenovo Vantage after every cell swap.

BIOS reporting poor battery health immediately after replacement

The ThinkPad BIOS stores learned capacity data in EEPROM tied to the original cell. When a new cell installs, the BIOS reads stale cycle-count and wear data from the old EEPROM record and flags the battery as degraded before a single charge completes. This is not a fault in the replacement cell. Running one full discharge-to-hibernate followed by an uninterrupted full charge resets the learn cycle. After two to three calibration cycles the BIOS health indicator and Lenovo Vantage will reflect accurate data for the new cell.

Laptop shuts down at 20–30% charge shown after battery swap

This happens because the fuel gauge IC is still mapping voltage curves from the old, degraded cell. Under full CPU and display load — common in tent or tablet mode on the X1 Titanium — the new cell hits a steeper voltage curve than the IC expects, triggering a premature shutdown. The fix is the same calibration sequence: discharge fully to hibernate cutoff, then charge to 100% without interruption. After two full cycles the fuel gauge IC recalibrates its voltage-to-capacity curve and the shutdown at 20–30% stops.

Compatible Models

ThinkPad X1 Titanium Yoga Gen 1 20QA001QPB ThinkPad X1 Titanium Yoga G1-20QA001RMH ThinkPad X1 Titanium Yoga Gen 1 20QA000LUS ThinkPad X1 Titanium Yoga Gen 1 ThinkPad X1 Titanium Yoga Gen 1 20QA001HRT ThinkPad X1 Titanium Yoga Gen 1 20QA0030GE ThinkPad X1 Titanium Yoga Gen 1 20QA002TUK ThinkPad X1 Titanium Yoga G1-20QA0030GE ThinkPad X1 Titanium Yoga Gen 1 20QA001GGE ThinkPad X1 Titanium Yoga G1-20QA001JMX ThinkPad X1 Titanium Yoga Gen 1 20QA000RUS ThinkPad X1 Titanium Yoga Gen 1 20QA001VRT ThinkPad X1 Titanium Yoga Gen 1 20QA001TIV ThinkPad X1 Titanium Yoga Gen 1 20QA000QUS ThinkPad X1 Titanium Yoga G1 20QA001RGE

Replaces Part Numbers

L19M4P73 5B10W13965 SB10T83208

Technical Specifications

Voltage7.7V
Amp Hours5700mAh
Capacity5700mAh
Rate43.89Wh
Net Weight183g /6.46 oz
Gross Weight443g /15.63 oz
Approximate Weight443g /15.63 oz
Dimension 271.42 x 131.80 x 6.20mm

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

Why does Lenovo Vantage show the wrong Wh rating after I put in the new L19M4P73 cell?

The Wh figure displayed in Vantage and Device Manager pulls from EEPROM data stored in the battery controller, not from a live measurement of the cell. When the new cell installs, the controller may report the rated Wh from its firmware rather than the actual chemistry capacity until a learn cycle runs. Complete one full discharge-to-hibernate then charge to 100% without interruption. After that cycle the reported Wh figure will align with the cell's actual 43.89Wh rating.

The replacement battery is stuck at 80% and won't charge higher — is the cell faulty?

Not likely a cell fault. ThinkPad BIOS includes a charge threshold feature — sometimes called Conservation Mode in Lenovo Vantage — that caps charging at 80% to slow long-term wear. Check Lenovo Vantage under Power → Charge Threshold and confirm the upper limit is set to 100%. If Vantage is not installed, enter the BIOS at startup, navigate to Config → Power, and set the charge stop threshold to 100%.

The fuel gauge is jumping around — showing 60%, then 45%, then 70% within minutes of unplugging. What causes that?

The fuel gauge IC uses a voltage-to-capacity map calibrated against the previous cell's wear characteristics. With a fresh cell installed, that map no longer matches actual cell behaviour, so readings swing erratically under changing load. Run two complete discharge-to-hibernate and full-charge cycles back to back. This gives the fuel gauge IC enough data points to rebuild an accurate curve for the new cell, and the erratic percentage readings will stop.

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