Lenovo Legion S7 16IAH7 5B11F29413 Replacement Battery 15.52V
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Lenovo Legion S7 16IAH7 5B11F29413 Replacement Battery 15.52V - 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 S7 16IAH7 5B11F29413 Replacement Battery 15.52V - is backordered and will ship as soon as it is back in stock.
Voltage
15.52V
Amp
6250mAh
Lenovo Legion S7 16IAH7 / 16ARHA7 — 15.52V Li-Polymer Replacement Battery (5B11F29413)
This is a 15.52V, 6250mAh (97Wh) Li-Polymer replacement battery for the Lenovo Legion S7 16-inch gaming laptop series. It fits the Legion S7 16IAH7 and 16ARHA7 across a wide range of regional SKUs, including 82TF008SRK, 82TF001XMJ, 82TF002GPH, and 82UG0011TW. It replaces OEM part numbers 5B11F29413, 5B11F29420, L21B4PE1, L21C4PE1, and L21M4PE1.
- Legion S7 16IAH7 and 16ARHA7 compatibility: Both the Intel (IAH7) and AMD (ARHA7) variants of the S7 16 share the same 15.52V four-cell battery architecture and connector pinout. The BMS handshake and cell voltage rails are identical across these platforms, which is why one replacement covers both processor generations.
- Bench tested on actual hardware: We cycled this cell through full charge and discharge on a Legion S7 16IAH7 unit. The BMS balanced all four cells without error, held the 15.52V nominal rail under sustained CPU and GPU load, and passed the BIOS battery detection handshake on first connection.
- Post-install calibration cycle: After fitting this battery, run it down until the laptop hibernates at the BIOS cutoff voltage, then charge uninterrupted to 100% without interruption. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after a cell swap.
Legion S7 shutting down at 20–30% shown after battery swap
The Legion S7 draws hard on the battery when the CPU and discrete GPU both spike simultaneously — common during game loading or benchmark runs. A new cell's fuel gauge IC hasn't mapped the actual charge curve yet, so the reported percentage lags behind real state of charge. When the cell voltage drops below the BMS protection threshold, the laptop cuts out even though the OS shows remaining charge. Run two or three full discharge-to-hibernate and full-charge cycles — the fuel gauge IC recalibrates against the new cell and the premature shutdowns stop. After calibration, the BIOS-reported cut-off should align at or below 10% on screen.
BIOS reporting battery health as "poor" or "consider replacing" immediately after install
This warning reads from EEPROM data written by the outgoing cell — cycle count, health percentage, and charge history carried over from the old battery. The new cell hasn't yet written its own EEPROM baseline to the system. Run the Lenovo Vantage battery gauge reset function, or perform one full discharge-to-hibernate followed by a complete uninterrupted charge. After that cycle completes, restart into the BIOS and check the battery status page — the health flag should clear and report normal.
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 S7 shows the battery as 0% or "unknown" in Windows right after I installed the new cell — is it dead?
It isn't dead. The fuel gauge IC on the new cell has no calibration data for this laptop yet, so Windows reads the state of charge as undefined or zero. Run a full discharge until the laptop hibernates at the BIOS low-voltage cutoff, then charge uninterrupted to 100%. After that first complete cycle, the fuel gauge IC maps the charge curve and the OS reads a normal percentage.
The Legion S7 stopped charging at 80% after I swapped the battery — the charge light goes out and nothing moves past that.
This is a BIOS-controlled charge limit, not a fault with the replacement cell. Lenovo Vantage has a "Conservation Mode" setting that caps charging at 80% to reduce cell stress during long plugged-in sessions. Open Lenovo Vantage, go to Power, select Battery Settings, and switch from Conservation Mode to Normal Mode. Charge should then proceed to 100%.
Windows and Lenovo Vantage are showing the wrong Wh rating — 80Wh instead of 97Wh — after fitting this battery. Why?
The Wh figure displayed in software is read from the EEPROM on the battery cell itself, and some replacement cells ship with a rated design capacity encoded slightly differently from the measured actual capacity. This is an EEPROM metadata difference, not a capacity reduction. Confirm the actual capacity by running a full discharge cycle and checking the Vantage battery report — the full-charge capacity entry will reflect the real 97Wh value after one calibration cycle.
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