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Lenovo Legion S7 15.36V Replacement Battery L19C4PC3

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From $94.99 USD $116.99
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Fits Lenovo Legion S7, Legion R9000X, and related models; replaces OEM part L19C4PC3, L19M4PC3, SB10Z49582, or 5B10Z49581.
15.36V, 4500mAh capacity delivers 69.12Wh — matches original output for full gaming and sustained CPU load.
Connector seats flat into the battery slot with locking tab on the left side; no forced insertion needed.
Bench testing showed the BMS balanced cells on first charge cycle with no cutoff errors or thermal drift detected.
After installation, run one full discharge to hibernation-cutoff, then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears inaccurate health warnings.
Extended delivery time

Available by SPECIAL ORDER. Delivery for this product typically takes 2 weeks.

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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.

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.

Voltage

15.36V

Amp

4500mAh

Lenovo Legion S7 15IMH5 — 15.36V Li-Polymer Replacement Battery (L19C4PC3)

This is a 15.36V, 4500mAh (69.12Wh) Li-Polymer replacement battery for the Lenovo Legion S7 series gaming laptop. It fits the Legion S7 15IMH5 (82BC), Legion R9000X, and several closely related variants. When the original cell degrades and the laptop stops holding a charge off AC power, this cell restores portable operation.

  • Legion S7 / R9000X platform fit: These models share the same 15.36V four-cell architecture, connector pinout, and BMS handshake protocol. OEM part numbers L19C4PC3, L19M4PC3, SB10Z49582, and 5B10Z49581 are all cross-compatible within this platform — the difference is supplier sourcing, not specification.
  • Bench tested on actual hardware: We ran this cell through charge, discharge, and BMS communication checks on a Legion S7 15IMH5 unit. The BMS recognised the cell immediately, reported correct voltage, and the fuel gauge IC began tracking state-of-charge without errors after two full cycles.
  • BIOS learn cycle after installation: After fitting this cell, run one full discharge to hibernate-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 on Lenovo systems.

BIOS reporting battery health as "Poor" after fitting a new cell

Lenovo's BIOS reads health data from the cell's EEPROM, which stores cycle count and wear metrics from the previous battery. When a new cell is installed, that EEPROM data resets, and the BIOS briefly misreads the initialisation state as degraded. This is a firmware calibration lag, not a fault with the replacement cell. Running one full discharge-to-hibernate then a full uninterrupted charge forces the BIOS learn cycle to complete. After that cycle, health status updates to normal and the warning clears.

Laptop shutting down at 20–30% displayed charge under gaming load

Under full CPU and GPU load, the Legion S7 draws significantly more current than during light use. If the fuel gauge IC hasn't completed calibration cycles against the new cell, it maps the old cell's voltage curve onto the new one. The result is that the displayed percentage doesn't match the real state-of-charge — the cell hits its voltage cliff before the OS expects it, triggering an abrupt shutdown. Complete two full discharge-to-hibernate cycles under normal load to allow the fuel gauge IC to re-map the curve accurately. After calibration, the reported cutoff aligns with the actual cell voltage floor at 12.0V.

Compatible Models

Legion S7 Legion R9000X Legion S7 15IMH5 Legion S7 15IMH5 82BC0052AU Legion Y9000X Legion Y750S-15 Legion S7 15IMH5 82BC0051AU

Replaces Part Numbers

L19C4PC3 L19M4PC3 SB10Z49582 5B10Z49581

Technical Specifications

Voltage15.36V
Amp Hours4500mAh
Capacity4500mAh
Rate69.12Wh
Net Weight267.8g /9.45 oz
Gross Weight527.8g /18.62 oz
Approximate Weight527.8g /18.62 oz
Dimension 285.00 x 91.50 x 5.70mm

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 shows the new battery as "Unknown" and 0% right after I installed it — is the cell dead?

The fuel gauge IC in the Legion S7 carries calibration data from the previous cell in its EEPROM. When a new cell is installed, the IC has no baseline to read against yet, so it reports 0% or "Unknown" until it completes at least one full cycle. Plug in, let it charge uninterrupted to 100%, then discharge to hibernate-cutoff under normal use. After that first full cycle, Vantage updates the reading and health status returns to a normal value.

The battery capacity showing in Lenovo Vantage or HWiNFO is only 60–62Wh, but the spec says 69.12Wh — why is there a discrepancy?

The Wh figure reported by Windows and third-party tools is pulled from the EEPROM's "design capacity" field, which the fuel gauge IC populates based on initial cell chemistry readings. On a freshly installed Li-Polymer cell, the IC under-reports until it has completed calibration cycles and established an accurate full-charge capacity against the actual chemistry. This is not a capacity defect. Run two full discharge-to-hibernate cycles and the reported Wh figure will converge toward 69Wh as the IC calibrates against the real cell data.

The Legion S7 stops charging at exactly 80% and won't go higher — is the replacement cell faulty?

This is a BIOS-controlled charge limit, not a cell fault. Lenovo's firmware includes a Conservation Mode setting that caps charge at 55% or 80% to reduce long-term cell wear — it activates independently of which cell is installed. Open Lenovo Vantage, go to Power → Battery Settings, and check whether Conservation Mode or a custom charge threshold is enabled. Disabling it allows charging to 100%, and the BIOS charge limit setting persists across battery replacements.

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