Lenovo ThinkBook 14s Replacement Battery 15.44V L19M4PDB
Available by SPECIAL ORDER. Delivery for this product typically takes 2 weeks.
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Lenovo ThinkBook 14s Replacement Battery 15.44V L19M4PDB - 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 ThinkBook 14s Replacement Battery 15.44V L19M4PDB - is backordered and will ship as soon as it is back in stock.
Voltage
15.44V
Amp
3850mAh
Lenovo ThinkBook 14s Yoga ITL Series — 15.44V Li-Polymer Replacement Battery (L19M4PDB)
This is a 15.44V, 3850mAh (59.44Wh) Li-Polymer battery for the Lenovo ThinkBook 14s Yoga ITL convertible laptop. It fits the 20WE series and over 160 additional ThinkBook 14s Yoga ITL variants sharing the same voltage rail and connector pinout. Install it when the original cell no longer holds charge or the system shuts down unexpectedly under load.
- ThinkBook 14s Yoga ITL platform fit: Every 20WE-series unit runs the same 15.44V four-cell Li-Polymer architecture with an identical BMS handshake and connector. Part numbers L19M4PDB, L19C4PDB, L20M4PDB, and L20C4PDB are all cross-compatible within this platform — the OEM changed the label across production runs, not the cell specification.
- Bench tested on actual hardware: We ran this cell through charge-discharge cycles on a ThinkBook 14s Yoga ITL unit and confirmed the BMS initialised correctly, the fuel gauge IC accepted the new cell data, and the charge controller reached 100% without tripping a protection fault.
- Post-install calibration on the ThinkBook 14s Yoga: After fitting, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle. Without it, the BIOS often flags the new cell as degraded and the fuel gauge reads inaccurately for the first few sessions.
BIOS reporting battery health as poor after a cell swap on the ThinkBook 14s Yoga
When you swap the battery on this platform, the BIOS reads EEPROM data written by the old cell — charge cycles, rated capacity, and health state. The new cell carries different EEPROM values, so the BIOS immediately flags a health mismatch. This is not a fault with the replacement cell. Run a full discharge to hibernate, then a full uninterrupted charge to 100%, and the BIOS learn cycle will overwrite the old data with values from the new cell.
ThinkBook 14s Yoga shutting down at 20–30% shown on the fuel gauge
This happens when the cell voltage drops sharply under combined CPU and display load — the convertible touchscreen draws additional current compared to a standard clamshell. The fuel gauge IC predicts remaining charge at idle, but under full load the cell hits the BMS undervoltage cutoff before the displayed percentage reaches zero. If this persists after two calibration cycles, check the BIOS battery conservation mode setting — it may be artificially capping the usable voltage window. Disable conservation mode and run another full discharge-to-hibernate cycle, then recharge to 100%.
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
My ThinkBook 14s Yoga is showing the wrong Wh rating in Lenovo Vantage after I installed the new battery — is the cell faulty?
The Wh figure displayed in Lenovo Vantage and in the BIOS pulls from EEPROM data embedded in the battery controller, not a live measurement. A fresh cell ships with rated chemistry values that can differ slightly from the previous cell's EEPROM record, so the displayed number changes. This is an EEPROM reporting difference, not a fault. Run two full discharge-to-100% charge cycles and the fuel gauge IC will recalibrate against the actual cell, and the Vantage reading will stabilise.
The fuel gauge on my ThinkBook 14s Yoga jumps wildly — showing 60%, then 45%, then back to 55% within minutes of unplugging.
The fuel gauge IC on this platform needs several full cycles against the new cell before its charge-prediction model is accurate. After a cell swap, the IC is still using learned data from the old battery, so the percentage reading oscillates under changing load. Run three complete discharge-to-hibernate then full-charge-to-100% cycles without interrupting the charge. After the third cycle the IC's model will match the new cell's actual discharge curve and the gauge will read steadily.
New battery installed but the ThinkBook 14s Yoga stops charging at 80% and won't go higher — nothing I do changes it.
This is a BIOS-level charge limit, not a fault with the cell. Lenovo's firmware includes a battery conservation mode that caps charging at 80% to reduce cycle wear — it ships enabled on many units and survives a battery swap. Open Lenovo Vantage, go to Power → Battery, and toggle conservation mode off. Once disabled, plug in and the charge controller will continue past 80% to 100%.
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