Lenovo L19C4PH0 Yoga Slim 9 Replacement Battery 7.72V 8150mAh
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Lenovo L19C4PH0 Yoga Slim 9 Replacement Battery 7.72V 8150mAh - 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 L19C4PH0 Yoga Slim 9 Replacement Battery 7.72V 8150mAh - is backordered and will ship as soon as it is back in stock.
Voltage
7.72V
Amp
8150mAh
Lenovo Yoga Slim 9 14ITL5 — 7.72V Li-Polymer Replacement Battery (L19C4PH0)
This 7.72V, 8150mAh Li-Polymer cell replaces the original battery in the Lenovo Yoga Slim 9 14ITL5 ultrabook. It covers a wide range of 14ITL5 regional variants, including the 82D1002VIV, 82D1003CRU, 82D1003WVN, and 82D1004DLM, among others. OEM part numbers L19C4PH0, L19M4PH0, and SB10Y75087 all cross-reference to this cell.
- Yoga Slim 9 14ITL5 variant coverage: All 14ITL5 variants share the same battery bay dimensions, voltage rail, and BMS connector pinout. The physical cell measures 291.40 × 108.80 × 4.60mm — the slim 4.6mm profile is specific to this chassis and must be matched exactly.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a 14ITL5 unit. The BMS handshake completed cleanly, charge current ramped correctly through CC and CV phases, and the protection circuit tripped at the expected voltage floor under load.
- Post-install calibration on the Yoga Slim 9: After fitting, run the laptop down to hibernate cutoff without interruption, 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 after every cell swap.
BIOS reporting battery health as poor after replacing the L19C4PH0
When a new cell goes in, the BIOS still holds EEPROM data from the old battery. The fuel gauge IC has no cycle history for the new cell, so the health calculation is built on stale reference points. Until the learn cycle runs, the system reports artificially low health or flags a warning in Lenovo Vantage. One full discharge-to-hibernate followed by an uninterrupted charge to 100% gives the fuel gauge IC the data it needs to recalibrate.
Yoga Slim 9 shutting down at 20–30% remaining after battery swap
This happens when the cell voltage drops below the BMS cutoff threshold under combined CPU and display load before the fuel gauge expects it. The gauge, still running on old EEPROM calibration data, reads 20–30% but the actual cell voltage has already hit the floor. It is not a fault with the replacement cell — it is a calibration gap. Run two full discharge-to-hibernate cycles with the display at full brightness and a moderate CPU load, then charge to 100% each time. After two cycles, the fuel gauge IC maps the new cell's voltage curve accurately and the early shutdowns stop.
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
Lenovo Vantage is showing the wrong Wh rating after I put in the new battery — is the cell faulty?
The Wh figure shown in Vantage pulls from EEPROM data embedded in the battery controller, not from a live measurement of the cell. The rated value stored in the replacement cell's EEPROM may differ slightly from the original because of chemistry tolerances between manufacturing batches. This is a reporting difference, not a capacity fault. Run a full discharge-to-hibernate cycle followed by a full charge, and the system will update its fuel gauge reference to match the actual cell.
The fuel gauge is jumping around — showing 60%, then 45%, then back to 55% within minutes. What causes that?
The fuel gauge IC calibrates itself against cycle history data from the previous cell. With a new cell installed, there is no history, so the IC is interpolating voltage readings against a curve that does not match the new chemistry. The readings stabilise after two or three complete discharge-and-charge cycles. Run the laptop down to hibernate cutoff on battery, charge fully to 100%, and repeat once more — after that, the IC has enough data to track the new cell accurately.
My Yoga Slim 9 stops charging at 80% and won't go higher — is something wrong with the replacement cell?
The 80% charge limit is a BIOS-controlled setting in Lenovo Vantage called Conservation Mode. When it is active, the firmware instructs the charging circuit to stop at 80% regardless of which cell is installed. Open Lenovo Vantage, go to Power, then Battery Settings, and switch Conservation Mode off. Charging will then proceed to 100%.
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