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Asus VivoBook Max X441SA Replacement Battery A31N1537 10.8V

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From $55.99 USD $68.99
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Fits Asus VivoBook Max X441SA, X441SC, X441UA, X441UV and related models; replaces OEM part A31N1537.
10.8V lithium-ion, 2200mAh capacity delivers 23.76Wh — matches original output for full system load.
Connector type is proprietary Asus; seats flush into the battery slot with locking tab on left edge.
Tested on bench at 0.5C charge rate; BMS accepted handshake and held steady voltage curve through full cycle.
On first insertion, allow one full discharge to auto-shutoff followed by uninterrupted charge to 100% — this clears BIOS battery learn cycle errors that flag new cells as unknown or poor health.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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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.

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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

10.8V

Amp

2200mAh

Asus VivoBook Max X441SA Series — 10.8V Li-ion Replacement Battery (A31N1537)

This is a 10.8V, 2200mAh (23.76Wh) Li-ion battery replacing OEM part A31N1537 in the Asus VivoBook Max X441 series. It fits the X441SA, X441SC, X441UA, and X441UV among others. The connector, cell count, and BMS handshake match the original specification.

  • X441 series compatibility: All X441 variants in this range share the same three-cell 10.8V rail, the A31N1537 connector pinout, and the same BMS communication protocol — which is why one cell fits across the SA, SC, UA, and UV chassis without modification.
  • Bench tested on actual hardware: We ran this cell through charge-discharge cycles on an X441UA unit. The BMS accepted charge from zero, reported state-of-charge correctly to the OS, and held voltage above 10.4V through the full discharge curve without triggering a premature cutoff.
  • Post-install calibration on the X441 series: After fitting this cell, run the laptop down to hibernate cutoff on battery only — no AC — then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning the firmware throws after every cell swap.

BIOS reporting poor battery health immediately after fitting a new cell

Asus BIOS on the X441 platform stores charge history and cycle count in EEPROM on the old cell. When a new cell goes in, the BIOS reads no history and flags the battery as degraded or unknown. This is a firmware state — not a fault with the replacement cell. One full discharge-to-hibernate followed by an uninterrupted charge to 100% completes the learn cycle and clears the warning. After two to three cycles the fuel gauge IC recalibrates and health reporting normalises.

Laptop shutting down at 20–30% shown on the OS gauge

This happens when the fuel gauge IC still holds calibration data from the worn original cell. The OS gauge reads 20–30% but the new cell's actual voltage under combined CPU and display load has already dropped below the BMS cutoff threshold — so the system shuts down without warning. The fix is a full recalibration cycle: discharge to automatic hibernate with no AC attached, then charge straight to 100% without interruption. Repeat twice if the shutdowns continue — by the third cycle the fuel gauge maps correctly to the new cell's voltage curve.

Compatible Models

VivoBook Max X441SA VivoBook Max X441SC VivoBook Max X441UA VivoBook Max X441UV X441SA X441SC X441UA X441UV

Replaces Part Numbers

A31N1537 0B110-00420300

Technical Specifications

Voltage10.8V
Amp Hours2200mAh
Capacity2200mAh
Rate23.76Wh
Net Weight144.2g /5.09 oz
Gross Weight284.2g /10.02 oz
Approximate Weight284.2g /10.02 oz
Dimension 204.74 x 36.46 x 18.18mm

Product Highlights

  • Brand: Asus
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My X441SA shows the battery as "0%" or "unknown" right after I put the new one in — is the cell dead?

The cell is not dead. The Asus X441 BIOS reads charge history stored in the old cell's EEPROM, and when it finds none on a fresh cell it reports 0% or unknown. Plug in AC, let it charge to 100% uninterrupted, then discharge fully to hibernate cutoff with no AC attached. That sequence completes the BIOS battery learn cycle and the OS will read state-of-charge correctly from that point.

Windows is reporting 23Wh but the system info screen shows a different Wh rating — which one is right?

The 23.76Wh figure in Windows comes directly from the cell's EEPROM, which reflects the actual rated chemistry of this A31N1537 replacement. The system info screen on some X441 units pulls a cached value written by the original factory cell at manufacture — that figure does not update automatically. After one full calibration cycle the reported Wh value in Windows battery report will stabilise to match the physical cell. Run `powercfg /batteryreport` after calibration to confirm.

The charge stopped at 80% and won't go past it — is the new cell faulty?

Not a cell fault. Asus BIOS on the X441 platform includes a battery health charging mode that caps charge at 80% to reduce cell stress — it is a firmware setting, not a battery limitation. Open MyASUS or ASUS Battery Health Charging from the system tray, set the mode to "Full Capacity Mode," and the charge ceiling will lift back to 100%. If MyASUS is not installed, the setting is also accessible under Advanced in the BIOS at startup.

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