Asus VivoBook S430UF Compatible Battery B31N1732 11.55V 3600mAh
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Asus VivoBook S430UF Compatible Battery B31N1732 11.55V 3600mAh - 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 VivoBook S430UF Compatible Battery B31N1732 11.55V 3600mAh - is backordered and will ship as soon as it is back in stock.
Voltage
11.55V
Amp
3600mAh
Asus VivoBook S430UF Series — 11.55V Li-ion Replacement Battery (B31N1732)
This is a 11.55V, 3600mAh (41.58Wh) Li-ion replacement battery for the Asus VivoBook S430UF, K430UF, V430UF, and S4300UF laptops. It fits the OEM socket and connector without modification. Order by part number B31N1732 or cross-reference 0B200-02960000 and 0B200-02960400 to confirm fitment before purchasing.
- S430 / K430 / V430 platform fitment: These models share the same 11.55V three-cell architecture, battery connector pinout, and BMS handshake protocol — that is why a single part number covers the entire platform. The charge controller communicates with the same EEPROM register set across all variants.
- Bench tested on actual hardware: We ran this cell on a VivoBook S430UF under a mixed CPU and display load. The BMS held the charge curve cleanly from 0% to 100%, and the thermal protection tripped correctly above the rated cutoff threshold.
- Post-install learn cycle on the S430 platform: After installing, run one full discharge down to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that nearly always appears after a cell swap on this platform.
Why the VivoBook S430UF BIOS reports poor battery health after a new cell install
The S430UF BIOS reads health data from an EEPROM register on the battery's BMS board. When a new cell is installed, that register contains factory default values that do not match the laptop's charge history — the BIOS interprets this mismatch as a degraded battery. This is not a fault with the new cell. Running one complete discharge-to-hibernate and a full uninterrupted charge resets the learn cycle and writes fresh data into the register, clearing the warning on next boot.
S430UF shutting down at 20–30% charge shown on the fuel gauge
This happens because the fuel gauge IC is still calibrated to the old, degraded cell's voltage curve. A new cell holds voltage higher and longer, then drops steeply near depletion — the fuel gauge misreads that cliff and fires a shutdown before the percentage reaches zero. It is not a BMS fault or a compatibility issue. Run two full discharge-to-hibernate cycles followed by uninterrupted charges to 100% and the gauge IC will recalibrate to the new cell's curve, with the cutoff moving back below 5%.
Compatible Models
Replaces Part Numbers
Technical Specifications
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 S430UF BIOS is showing the replacement battery as "unknown" or 0% — is the cell dead?
No. The BIOS reads capacity and health data from the battery's EEPROM register, which ships with factory defaults that the S430 BIOS flags as unrecognised. The cell itself is fine. Run one full discharge to hibernate cutoff, then charge uninterrupted to 100% — this forces the BIOS learn cycle to write new data to the register and the unknown status clears on the next boot.
Windows is showing 41Wh in battery settings but the laptop keeps cutting out well before the gauge hits zero — what's wrong?
The fuel gauge IC on the S430UF is still mapped to the old cell's discharge curve. A new Li-ion cell holds a higher terminal voltage through most of its range and then drops sharply near the end — the IC fires a low-battery shutdown early because it is reading that voltage cliff against the wrong curve. This is not a hardware fault. Complete two full discharge-to-hibernate and uninterrupted charge-to-100% cycles and the IC recalibrates to the new cell's profile.
The new battery charges fine but stops at exactly 80% and won't go higher — is this a faulty cell?
No — this is a BIOS-controlled charge limit, not a battery fault. The Asus S430 BIOS includes a battery health charging mode that caps charging at 80% to reduce long-term cell stress. It ships enabled on many units. Open the MyAsus app (or Asus Battery Health Charging utility), set the charge mode to "Full Capacity Mode," and the cell will charge through to 100%.
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