Asus TP201 Replacement Battery 11.4V 4150mAh B31N1536
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 TP201 Replacement Battery 11.4V 4150mAh B31N1536 - 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 TP201 Replacement Battery 11.4V 4150mAh B31N1536 - is backordered and will ship as soon as it is back in stock.
Voltage
11.4V
Amp
4150mAh
Asus TP201SA Series — 11.4V Li-ion Replacement Battery (B31N1536)
This is an 11.4V 4150mAh (47.31Wh) Li-ion battery for the Asus TP201 and TP201SA VivoBook Flip hybrid. It fits the TP201SA-FV0027D, TP201SA-FV0007T, and over a dozen additional TP201SA variants. The OEM part numbers it replaces are B31N1536 and 0B200-02040000.
- TP201SA series compatibility: All TP201SA models share the same 11.4V three-cell configuration, connector pinout, and BMS handshake protocol. That common electrical architecture means one battery covers the full production run of this hybrid line without firmware conflicts or connector mismatch.
- Bench tested on actual hardware: We cycled this cell through charge, full load discharge, and BMS cutoff on a TP201SA unit. The BMS communicated state-of-charge correctly, charge termination triggered at the expected 12.6V ceiling, and no fault flags were thrown during the draw-down phase.
- Post-install calibration on the TP201SA: 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.
BIOS reporting poor battery health immediately after fitting a new cell
The TP201SA's BIOS reads health data from EEPROM registers carried over from the old cell, not from the physical chemistry of the new one. Until a learn cycle overwrites those registers, the system reports the new battery as degraded or unknown. This is a firmware state problem, not a cell defect. Run a full discharge to hibernate-cutoff followed by an uninterrupted charge to 100% — most units clear the health warning within two cycles.
TP201SA shutting down at 20–30% charge shown on screen
The fuel gauge IC on this platform was calibrated against the original cell's discharge curve. A new cell has a slightly different voltage-to-capacity slope, so the gauge reads 20–30% remaining when the cell voltage has already dropped below the load-sustain threshold under full CPU and display draw. The system shuts down to protect the cell, even though the gauge says charge remains. Two full calibration cycles — complete discharge to cutoff, full uninterrupted recharge — align the fuel gauge IC to the new cell's actual curve and eliminate the early shutdown.
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
Why does Windows show the new battery Wh rating as different from what's listed on the spec sheet?
The Wh figure Windows reports is pulled from EEPROM data embedded in the battery's BMS, which stores the rated chemistry value at manufacture. The actual usable capacity after a full calibration cycle may read slightly differently until the fuel gauge IC has mapped its discharge curve against the new cell. This is not a fault — it resolves after two full discharge-recharge cycles. Check the value again after the second complete cycle from 100% down to hibernate-cutoff.
The TP201SA fuel gauge is jumping around wildly — showing 60%, then 85%, then 40% within minutes of each other.
The fuel gauge IC lost its reference curve when the old cell was removed and has not yet built one for the new cell. It is estimating state-of-charge without an accurate baseline, so readings are erratic. Run the battery down fully until the laptop hibernates, then charge uninterrupted to 100% without using the device. Repeat that cycle once more — after the second complete cycle the gauge IC will have enough data to track the new cell accurately.
New battery installed but the TP201SA won't charge above 80% — charger is connected and the LED shows charging.
The TP201SA BIOS includes a charge limit setting that caps the cell at 80% to reduce long-term wear — it ships enabled on some units and can be toggled on accidentally during a BIOS update or reset. Open the MyASUS app or go into the BIOS under Advanced → Battery Health Charging and check whether the charge limit mode is active. Switch it to Full Capacity Mode, save, and reboot — the battery will then charge to 100%.
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