Lenovo Legion 7 16ACHg6 L20C4PC1 Compatible Battery 15.36V
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Lenovo Legion 7 16ACHg6 L20C4PC1 Compatible Battery 15.36V - 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.
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Disclaimer
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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Lenovo Legion 7 16ACHg6 L20C4PC1 Compatible Battery 15.36V - is backordered and will ship as soon as it is back in stock.
Voltage
15.36V
Amp
5100mAh
Lenovo Legion 7 16ACHg6 / Legion 5 Pro — 15.36V Li-Polymer Replacement Battery (L20C4PC1)
This is a 15.36V, 5100mAh (78.34Wh) Li-Polymer battery that replaces the original L20C4PC1 cell in the Lenovo Legion 7 16ACHg6 and Legion 5 Pro series gaming laptops. It fits the 82N6005WMB and related models across the Legion 7 and Legion 5 Pro lines. Voltage, connector pinout, and BMS communication protocol match the OEM spec.
- Legion 7 and Legion 5 Pro platform fit: Both the Legion 7 16ACHg6 and Legion 5 Pro 82JD series share the same 15.36V four-cell Li-Polymer architecture and use the same BMS handshake protocol. That common voltage rail and connector spec is why one part number covers both product lines without modification.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on Legion hardware. The BMS completed CCCV charge without fault flags, and the fuel gauge IC accepted the new cell data after the BIOS battery learn cycle cleared.
- Post-install calibration on Legion BIOS: After fitting this battery, run one full discharge until the laptop hibernates on low-battery cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap — it is a firmware learning step, not a fault with the cell.
BIOS reporting battery health as poor immediately after replacement
The Legion BIOS reads health data from the battery's EEPROM, which stores charge cycle counts and rated Wh from the previous cell. When a new cell is installed, the EEPROM data does not match observed charge behaviour, so the BIOS flags the unit as degraded. This is not a defect in the replacement cell — it is a mismatch between stored historical data and a fresh chemistry baseline. Running the BIOS battery learn cycle (one full discharge to hibernate cutoff, then a full uninterrupted charge) resets that baseline. After one or two complete cycles, the health indicator should update to reflect the actual cell condition.
Laptop shuts down abruptly at 20–30% charge shown on screen
This happens when the fuel gauge IC has not yet calibrated against the new cell's voltage curve. The IC uses a stored discharge profile from the old cell to estimate remaining capacity, and that profile does not map accurately to the new chemistry until it has seen at least one full cycle. Under full CPU and display load, actual cell voltage drops faster than the gauge predicts, hitting the low-voltage cutoff before the displayed percentage reaches zero. Complete one full discharge-to-hibernate cycle, then charge to 100% without interruption — after that cycle the gauge IC recalibrates its endpoint and the 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
My Legion 7 shows the replacement battery as "0%" or "unknown" in Windows — is the cell dead on arrival?
It is not a dead cell. The Windows fuel gauge IC pulls capacity data from the battery's EEPROM, and on a fresh replacement the IC has not yet mapped the new cell's discharge curve. Power the laptop on, let it discharge fully until hibernate kicks in, then charge uninterrupted to 100%. After that first complete cycle the gauge re-initialises against the new cell and the reading normalises.
Lenovo Vantage is showing the wrong Wh rating — 80Wh instead of 78.34Wh — after I installed this battery. Is that a firmware mismatch?
The Wh figure displayed in Vantage is read from the EEPROM rated value stored at the factory, which can differ slightly from the actual measured capacity of the replacement cell. The 78.34Wh figure in the product spec is the real measured capacity. The discrepancy is a display artefact from EEPROM-stored data, not a sign that the wrong cell was fitted. No action is needed — the cell charges and discharges to its actual 78.34Wh regardless of what Vantage reports.
The new battery stops charging at 80% and will not go higher — is the cell faulty?
This is almost always the Lenovo BIOS charge limit feature, not a cell fault. Legion laptops ship with a firmware-controlled charge threshold that caps charging at 80% to reduce long-term cell stress when the laptop is regularly used on AC power. Open Lenovo Vantage, navigate to Power → Battery Settings, and switch the charge mode from "Conservation" to "Normal Charge" — the battery will then charge to 100%.
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