Asus GL502V ROG Replacement Battery 15.2V 4050mAh B41N1526
This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.
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Asus GL502V ROG Replacement Battery 15.2V 4050mAh B41N1526 - 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.
Asus GL502V ROG Replacement Battery 15.2V 4050mAh B41N1526 - is backordered and will ship as soon as it is back in stock.
Voltage
15.2V
Amp
4050mAh
Asus GL502V Series — 15.2V Li-Polymer Replacement Battery (B41N1526)
This 15.2V, 4050mAh (61.56Wh) lithium-polymer battery replaces the original B41N1526 cell in the Asus ROG GL502V gaming laptop. It fits the GL502V, GL502VT-BSI7N27, GL502VT, and over 190 additional GL502 variants sharing the same connector and BMS handshake profile. Capacity figures come from the product data — not estimated from a third-party source.
- GL502 platform compatibility: Every model in the GL502 line runs the same 15.2V four-cell Li-Polymer architecture with an identical connector pinout and BMS communication protocol. That shared voltage rail and handshake logic is why one cell covers the full range of GL502 variants without modification.
- Bench tested on actual hardware: We cycled this cell through full charge and discharge passes on a GL502VT unit. The BMS negotiated correctly, charge termination triggered at the expected voltage ceiling, and no cell mismatch errors were logged in the ACPI battery data.
- Post-install calibration on the GL502V: After fitting this cell, run one full discharge to the hibernate cutoff, then charge uninterrupted to 100% without suspending the laptop. This forces the GL502V's BIOS battery learn cycle to reset against the new cell's chemistry and clears the inaccurate health warning that appears after every cell swap.
GL502V shutting down at 20–30% charge shown on screen
This happens when the cell cannot sustain voltage under simultaneous full CPU load and display brightness. The GL502V pulls hard during GPU-intensive workloads, and if the fuel gauge IC hasn't calibrated to the new cell yet, it misreads remaining capacity. The BIOS acts on that bad reading and triggers a protective shutdown before the cell actually reaches zero. Run two full discharge-to-hibernate and uninterrupted-recharge cycles — after that the fuel gauge IC recalibrates and the shutdowns stop.
BIOS reporting new battery health as "poor" or "replace" immediately after install
The GL502V's BIOS reads health data stored in the old cell's EEPROM and compares it against the new cell on first boot. A freshly installed cell has no charge history, so the BIOS flags it as degraded. This is a data mismatch, not a fault with the replacement cell. Complete one full discharge-to-hibernate followed by a full uninterrupted charge to 100% — that learn cycle writes fresh EEPROM data and clears the false health warning.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Asus
- 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
The GL502V fuel gauge is jumping around wildly — showing 60%, then 40%, then 80% within minutes of unplugging. What's causing that?
The fuel gauge IC in the GL502V needs several charge and discharge cycles to build an accurate model of the new cell's chemistry. Until it does, the readings are extrapolated from the old cell's EEPROM data, which doesn't match the new cell's discharge curve. The erratic readings are not a fault — they stabilise after two to three full cycles. Run full discharges to the hibernate cutoff and full uninterrupted charges to 100% until the gauge tracks smoothly.
Windows is reporting the battery capacity as lower than the rated 61.56Wh — the system info shows something much smaller. Is the cell faulty?
The Wh figure Windows displays is pulled from the EEPROM on the old cell's last recorded state, not directly measured from the new cell's actual chemistry. After the BIOS battery learn cycle completes — one full discharge to hibernate, one full uninterrupted charge to 100% — the system rewrites that value against the new cell. If the figure still looks wrong after two full cycles, open Windows PowerShell, run `powercfg /batteryreport`, and check the Design Capacity vs Full Charge Capacity lines for the actual measured values.
The GL502VT won't charge above 80% after fitting this cell — it just stops there. Is the charge limit a setting or a battery fault?
The 80% charge ceiling on the GL502VT is a BIOS-controlled charge limit, not a fault with the replacement cell. Asus ships some GL502 units with Battery Health Charging enabled in the BIOS, which intentionally caps charge at 60% or 80% to reduce long-term cell stress. Open the BIOS (F2 at boot), navigate to the Advanced tab, find Battery Health Charging, and set it to Full Capacity Mode. The cell will then charge to 100%.
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