Asus R553LN Replacement Battery B31N1336 11.4V 4200mAh
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Asus R553LN Replacement Battery B31N1336 11.4V 4200mAh - 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 R553LN Replacement Battery B31N1336 11.4V 4200mAh - is backordered and will ship as soon as it is back in stock.
Voltage
11.4V
Amp
4200mAh
Asus R553LN Series — 11.4V Li-Polymer Replacement Battery (B31N1336)
This is an 11.4V, 4200mAh (47.88Wh) lithium-polymer replacement battery for the Asus R553LN, R553LF, and related 15-inch notebook models. It replaces OEM part numbers B31N1336, C31-S551, 0B200-00450100, and several variants used across the R553 line. The cell fits the original bay and connects to the existing motherboard connector without modification.
- R553LN and R553LF platform fit: Both model lines share the same three-cell Li-Polymer configuration, voltage rail, and BMS connector pinout. Asus used the same battery across these variants, so one cell covers the entire group without adapter or wiring change.
- Bench tested on actual hardware: We ran this cell through charge, discharge, and charge-cycle verification on the R553LN platform. The BMS handshake completed correctly, charge acceptance registered across the full capacity range, and no protection-circuit trips occurred under standard CPU-plus-display load.
- Post-install calibration on R553 hardware: After fitting this cell, run the laptop down to hibernate cutoff under normal use — do not force-drain it — then charge uninterrupted to 100%. This single cycle resets the BIOS battery learn cycle and clears the inaccurate "poor health" or low-percentage warning that appears routinely after any cell swap on this platform.
Why the R553LN shuts down at 20–30% charge remaining
The R553LN fuel gauge IC holds calibration data from the previous cell. When a new cell goes in, the IC maps the old discharge curve onto the new cell's chemistry. Under full CPU load with the display at brightness, the new cell's voltage drops faster than the IC predicts at that state of charge. The BIOS reads the voltage cliff as zero capacity and triggers an immediate shutdown — even though the gauge still shows 20–30%. Running two complete discharge-to-hibernate-cutoff cycles followed by full uninterrupted charges forces the IC to rebuild its discharge curve against the actual cell, and the shutdowns stop.
BIOS reporting 0% or "Unknown" battery after fitting a new cell
The BIOS reads battery state from EEPROM data written by the original cell's protection circuit. A new cell arrives with its own EEPROM values, which the Asus firmware treats as unrecognised until the learn cycle completes. The system may show 0%, "Unknown," or refuse to charge past a low threshold on first boot. Plug in the AC adapter, leave the laptop powered on and charging without interruption until the indicator shows 100%, then reboot — the BIOS re-reads the EEPROM at full charge and clears the unknown-state flag.
Compatible Models
Replaces Part Numbers
Technical Specifications
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
The R553LN battery gauge jumps around wildly for the first few days after I installed the new cell — is something wrong with it?
Nothing is wrong with the cell. The fuel gauge IC on the R553LN needs several real discharge-and-charge cycles to map its internal model against the new cell's actual capacity curve. Until it has that data, state-of-charge readings swing by 10–20% or more. Run two full cycles — discharge to hibernate cutoff under normal use, then charge uninterrupted to 100% each time — and the gauge stabilises.
My R553LN shows the correct percentage but the system info panel reports the wrong Wh rating after the swap — why does it not match the 47.88Wh spec?
The Wh figure shown in Windows or Asus system utilities is read from the battery's EEPROM, which stores a rated design capacity written at the factory. That value can differ slightly from the actual tested capacity of the replacement cell due to differences between the rated chemistry spec and the physical cell. This is a display artefact, not a capacity fault. Confirm real capacity by running a full discharge cycle and checking the mWh logged by the fuel gauge IC — it will align with the 4200mAh specification after calibration.
The R553LN stopped charging above 80% after I put in the new battery — is the cell faulty?
The charge limit is almost always a BIOS-controlled setting, not a cell fault. Asus laptops running MyAsus or Battery Health Charging utilities default to an 80% charge ceiling when that feature is active — it applies to any cell in the bay, including a brand-new replacement. Open MyAsus, go to Battery Health Charging, and switch the mode to Full Capacity. If MyAsus is not installed, check the BIOS power settings on next boot and disable the charge limit there.
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