Lenovo Legion 5 Pro 15.44V Replacement Battery 5B11F24156
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Lenovo Legion 5 Pro 15.44V Replacement Battery 5B11F24156 - 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 5 Pro 15.44V Replacement Battery 5B11F24156 - is backordered and will ship as soon as it is back in stock.
Voltage
15.44V
Amp
5100mAh
Lenovo Legion 5 Pro 16IAH7H — 15.44V Li-Polymer Replacement Battery (5B11F24156)
This is a 15.44V, 5100mAh (78.74Wh) Li-Polymer battery for the Lenovo Legion 5 Pro and Legion 5 series gaming notebooks. It fits the Legion 5 Pro 16IAH7H, 16ARH7H, Legion 5 15IAH7H, and over 140 additional Legion variants sharing the same power rail and connector. OEM part numbers covered include 5B11F24156, 5B11F24161, L21C4PC1, L21D4PC1, and L21M4PC3.
- Legion 5 and 5 Pro series fit: These models share a common 15.44V four-cell Li-Polymer architecture, the same ZIF connector pinout, and a unified BMS handshake protocol. Any variant in this family running the same voltage rail accepts this cell without modification.
- Bench tested on actual hardware: We ran this cell through charge-discharge cycles on a Legion 5 Pro chassis. The BMS negotiated correctly, charge termination triggered at full capacity, and no fault codes appeared on either the EC or BIOS battery page.
- Legion BIOS learn cycle after swap: After fitting this battery, run the laptop down to hibernate cutoff on battery alone, then charge uninterrupted to 100%. This resets the BIOS learn cycle against the new cell chemistry and clears the false "poor health" or inaccurate capacity warning that appears after every cell replacement on Legion hardware.
Legion shutting down at 20–30% shown after battery swap
Under full CPU and discrete GPU load, the Legion platform draws hard on the battery. A freshly fitted cell has an uncalibrated fuel gauge IC, so the reported state-of-charge does not match actual cell voltage. When real voltage hits the EC's low-voltage cutoff threshold — around 13.5V under load — the system shuts down even though the gauge still shows 20–30%. Two full discharge-to-hibernate and uninterrupted recharge cycles recalibrate the gauge IC and align the reported percentage with true cell voltage.
BIOS reporting battery Wh as wrong after replacement
The Wh figure the BIOS displays is read from EEPROM data embedded in the battery's BMS, not calculated live from the cell. A replacement cell may carry EEPROM values from a slightly different production batch, causing the system info page to show a Wh rating that does not match the label. This is a data field mismatch, not a capacity fault. The actual usable energy the cell delivers is unchanged — the displayed figure is cosmetic and does not affect charging or discharge behaviour.
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 shows the new battery as 0% or "unknown" right after I fitted it — is the cell dead?
The BIOS is reading stale EEPROM data from the previous cell and has not yet completed a learn cycle against the new one. Plug in AC power, let the battery charge uninterrupted to 100%, then run it down to hibernate cutoff on battery alone. That full cycle forces the EC to rewrite its battery profile and the percentage will read correctly from the next boot.
Why does my Legion's battery gauge jump around wildly for the first few days after swapping the cell?
The fuel gauge IC inside the battery needs several real charge-discharge cycles to map its voltage curve against the new cell's actual chemistry. Until that calibration completes, the reported percentage swings because the IC is interpolating against the old cell's curve. Run two or three full discharges to hibernate followed by uninterrupted charges to 100% and the readings will stabilise. After three cycles the gauge tracks closely against actual remaining capacity.
The new battery stopped charging at 80% and won't go higher — what's causing that?
This is a BIOS-controlled charge limit, not a fault with the cell. Lenovo Legion firmware includes a "Conservation Mode" setting that caps charging at 60% or 80% to reduce cell stress during long AC-connected use. Open Lenovo Vantage, go to Power, and check the Battery Charge Threshold setting — switch it to "Charge to 100%" and the next charge cycle will go to full capacity.
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