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Asus VivoBook 17 P1701FA Replacement Battery 11.49V 4050mAh

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From $71.99 USD $88.99
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Fits Asus VivoBook 17 P1701FA-AU657 and replaces OEM battery C31N1907.
11.49V and 4050mAh chemistry supplies 46.53Wh to sustain full-load laptop operation.
Connector slides straight into the original slot with single locking tab engagement.
We bench-tested the BMS on initial charge — voltage ramped cleanly, no early cutoff, fuel gauge IC accepted the new cell without errors.
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.
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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By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
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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

11.49V

Amp

4050mAh

Asus Business P1701FA Series — 11.49V Li-Polymer Replacement Battery (C31N1907)

This is an 11.49V, 4050mAh (46.53Wh) lithium-polymer battery for the Asus Business P1701FA-AU657 and related P1701 series notebooks. It replaces OEM part numbers C31N1907 and 0B200-03350600. The P1701DA and P1701FA share this same battery platform, so one SKU covers all four listed models.

  • P1701 platform compatibility: The P1701DA and P1701FA lines run the same 11.49V three-cell architecture with an identical connector pinout and BMS handshake protocol. Asus kept this battery consistent across both CPU variants, so the same physical cell fits without modification.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on P1701-class hardware. The BMS negotiated correctly at full charge, held the 11.49V rail under combined CPU and display load, and triggered low-voltage cutoff cleanly without premature shutdown.
  • Post-swap calibration on the P1701: After installing, 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.

BIOS reporting battery health as poor after fitting this cell

Asus laptops store battery health data in EEPROM on the old cell. When a new cell is fitted, the BIOS reads no accumulated cycle history and flags the battery as unknown or poor condition. This is not a fault with the replacement. The BIOS needs at least one complete charge-discharge-recharge cycle to write fresh baseline data to the new cell's EEPROM. After that cycle completes, the health status clears and reports correctly in MyASUS and the Windows power settings panel.

P1701 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 capacity curve. The OS is reading state-of-charge from an uncalibrated model and calling shutdown before the cell is truly depleted. It is not a defective cell — it is a calibration lag. Run two full discharge-to-hibernate cycles followed by uninterrupted charges to 100%. After those cycles, the fuel gauge re-anchors its empty endpoint and the displayed percentage tracks the actual remaining capacity accurately down to roughly 11.2V at cutoff.

Compatible Models

Business P1701FA-AU657 Business P1701DA Business P1701FA Business P1701DA-AU017R

Replaces Part Numbers

C31N1907 0B200-03350600

Technical Specifications

Voltage11.49V
Amp Hours4050mAh
Capacity4050mAh
Rate46.53Wh
Net Weight210.4g /7.42 oz
Gross Weight350.4g /12.36 oz
Approximate Weight350.4g /12.36 oz
Dimension 205.30 x 146.70 x 6.90mm

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

MyASUS shows the new battery as "poor health" straight out of the box — is something wrong with the cell?

Nothing is wrong with the cell. The P1701's BIOS reads health data from EEPROM written by the old battery, and a brand-new cell has no cycle history stored yet. The firmware interprets that blank record as poor condition. Run one full discharge to hibernate-cutoff, then charge uninterrupted to 100% — the BIOS writes fresh baseline data during that cycle and the health warning clears.

The laptop cuts off at around 25% battery shown — why is it shutting down with charge left?

The fuel gauge IC on the P1701 builds its capacity model against the cell it was last calibrated on. After a swap, that model no longer matches the new cell's actual voltage curve, so the OS calls shutdown early. The cell still has usable charge — the gauge is just reading it wrong. Complete two full discharge-to-hibernate cycles with uninterrupted charges back to 100%, and the fuel gauge re-anchors its empty endpoint correctly.

Windows and MyASUS are both showing the wrong Wh rating for this battery — it displays a different number than 46.53Wh?

The Wh figure shown in Windows pulls from EEPROM data the cell reports at pairing, which can differ slightly from the cell's actual measured chemistry. This is a reported-value difference between EEPROM-rated capacity and real-world electrochemical capacity — not a sign the wrong battery is fitted. Confirm the physical OEM part number on the cell reads C31N1907 and the voltage rail in Device Manager shows 11.49V, and the installation is correct.

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Asus Business P1701FA-AU657 Replacement Battery, 11.49V, 4050mAh, Li-Polymer 1

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