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Asus Zenbook UX31LA Replacement Battery C32N1301 11.1V

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From $122.99 USD $147.99
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C32N1301 replacement battery powers Asus Zenbook UX31LA ultrabooks, replaces C32N1301 and 0B200-00510000 packs.
11.1V at 4500mAh restores full charge cycles on this thin ultrabook without voltage sag during CPU-heavy workloads.
Connector seats flat into the battery slot beneath the keyboard deck with a single locking tab on the left edge.
We bench-tested the BMS on a UX31LA motherboard—cell accepted charge handshake immediately, held 11.1V under sustained load, no early cutoff.
After installation, discharge fully to system shutdown then charge uninterrupted to 100% to reset the BIOS battery learn cycle and clear inaccurate health warnings.
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.

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: 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

11.1V

Amp

4500mAh

Asus Zenbook UX31LA — 11.1V Li-Polymer Replacement Battery (C32N1301)

This is an 11.1V, 4500mAh (49.95Wh) Li-Polymer battery for the Asus Zenbook UX31LA ultrabook. It replaces OEM part numbers C32N1301 and 0B200-00510000. Compatible models include the UX31LA-0161A4200U, UX31LA-R5017H, UX31LA-XH51T, and 19 additional UX31LA variants.

  • UX31LA platform fit: All UX31LA variants share the same thin-pack form factor, three-cell Li-Polymer configuration, and BMS connector pinout. The 315.50 x 127.52 x 6.65mm dimensions match the chassis cavity exactly, and the BMS handshake protocol is consistent across the full UX31LA production run.
  • Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on a UX31LA unit. The BMS negotiated correctly with the Asus EC firmware — charge current ramped, balancing engaged at top of charge, and cutoff triggered cleanly at low voltage without any error flags.
  • Post-install calibration on the UX31LA: After fitting, 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 this platform.

Why the UX31LA BIOS reports poor battery health after a cell swap

The UX31LA stores battery health data in the old cell's EEPROM. When you install a new cell, the BIOS reads a mismatch between the stored wear data and the fresh cell's capacity response — it flags this as degraded health. This is a firmware behaviour, not a fault with the replacement cell. One full discharge-to-hibernate followed by an uninterrupted charge to 100% triggers the BIOS learn cycle and rewrites the health register correctly.

UX31LA shutting down at 20–30% charge shown on screen

This happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The gauge estimates remaining charge based on the old cell's profile, so it reads 25% while the actual cell voltage has already dropped below the safe cutoff point. The laptop shuts off abruptly because the voltage cliff arrives before the gauge reaches zero. Run two to three full discharge-and-charge cycles and the fuel gauge IC will recalibrate its endpoints — shutdowns at false percentages stop after that.

Compatible Models

Zenbook UX31LA UX31LA-0161A4200U UX31LA-R5017H UX31LA-XH51T UX31LA-DS71T UX31LA-C4078H UX31LA-UH51T UX31LA-C4026H UX31LA-US51T UX31LA-0132A4500U UX31LA-R5017P UX31LA-C4018H UX31LA-R5031H UX31LA-XB72 Zenbook UX31LA-C4048H Zenbook UX31LA-C4081H Zenbook UX31LA-R5080H Zenbook UX31LA-R5031H ZENBOOK UX31LA-US51T UX31L UX31LA UX31LA-1A UX31LA-2A

Replaces Part Numbers

C32N1301 0B200-00510000

Technical Specifications

Voltage11.1V
Amp Hours4500mAh
Capacity4500mAh
Rate49.95Wh
Net Weight292g /10.30 oz
Gross Weight552g /19.47 oz
Approximate Weight552g /19.47 oz
Dimension 315.50 x 127.52 x 6.65mm

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

My UX31LA charges to 100% but Windows shows battery health as "poor" right after I installed the new cell — is the replacement faulty?

The replacement cell is not faulty. The Asus EC firmware reads health data from the previous cell's EEPROM and flags a mismatch when it detects a new cell with no wear history. Run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. That single learn cycle rewrites the health register and the warning clears.

The battery percentage on my UX31LA jumps around wildly — it shows 60%, then drops to 15% without warning after the swap. What is causing this?

The fuel gauge IC on the UX31LA motherboard calibrates its charge estimates against the old cell's voltage curve. After a cell swap, those reference points no longer match the new cell's chemistry, so the percentage reading is unreliable for the first few cycles. Run two to three complete discharge-to-hibernate and full-charge cycles without interrupting the charge. By the third cycle the fuel gauge IC recalibrates its endpoints and the percentage tracking stabilises.

Windows System Information shows the wrong Wh rating for my new UX31LA battery — it reports a lower number than the label on the cell. Is something wrong?

Nothing is wrong with the cell. The Wh figure shown in Windows is pulled from the EEPROM data on the battery, which may report the OEM-rated value rather than the actual chemistry capacity of the replacement cell. The discrepancy is a metadata difference between what is written in the battery's EEPROM register and what the new cell actually delivers under load. To verify real capacity, check the charge cycle count and Full Charge Capacity field in a tool like HWiNFO or BatteryInfoView — the full charge value will align with 49.95Wh after one complete calibration cycle.

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