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Asus X453 Replacement Battery B21N1329 7.6V 4000mAh

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From $62.99 USD $76.99
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Fits Asus VivoBook X453, X453MA series; replaces OEM part B21N1329.
7.6V 4000mAh Li-ion cell restores full charge capacity to the ultrabook after original pack degrades.
Connector seats into the internal slot with keyed alignment; locking tab secures the pack flush against the motherboard.
We bench-tested this cell in an X453MA; the BMS accepted the new pack on first insertion with no fault codes.
After installation, run one full discharge to hibernation cutoff, then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears 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.

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🔹 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

7.6V

Amp

4000mAh

Asus VivoBook X453 Series — 7.6V Li-ion Replacement Battery (B21N1329)

This is a 7.6V, 4000mAh (30.4Wh) Li-ion replacement battery for the Asus VivoBook X453 and X453MA notebook series. It slots into the same bay as the original and connects via the same Asus two-cell connector. Covers OEM part numbers B21N1329, 0B200-00840000, and the full 0B200-008404xx–008407xx range.

  • X453 and X453MA compatibility: Both the standard X453 and X453MA share a two-cell 7.6V architecture with the same BMS handshake protocol. The cell count and connector pinout are identical across the 0122CN3530 and 0132DN3530 sub-models, so one battery covers the entire range without modification.
  • Bench tested on actual hardware: We cycled this cell on an X453MA and confirmed the BMS accepted the new EEPROM data without fault codes. Charge acceptance reached full 4000mAh capacity within the first two cycles, and the protection circuit tripped correctly at low-voltage cutoff.
  • First-cycle calibration on the X453MA: After fitting the new cell, run one full discharge down to hibernate-cutoff, then charge uninterrupted to 100%. This forces the X453 fuel gauge IC to relearn against the new cell's actual capacity curve and clears the false "poor health" warning that BIOS typically throws after any cell swap.

BIOS reporting battery health as poor immediately after fitting the X453 replacement

When the X453 BIOS reads "poor health" right after a swap, it is reading stale data from the previous cell's EEPROM profile, not the actual state of the new cell. The fuel gauge IC stores learned capacity data and compares it against a fixed Wh reference — a brand-new cell with no history looks degraded by that measure. One full discharge-to-hibernate followed by an uninterrupted charge to 100% resets the learn cycle. After two to three full cycles the BIOS health indicator should update to normal.

X453 shutting down suddenly while the OS still shows 20–30% remaining

This happens when the cell voltage drops sharply under combined CPU and display load — a voltage cliff the fuel gauge did not predict. The OS percentage is calculated from a capacity model, not live cell voltage, so the reading lags behind the actual drop. The BMS hits its low-voltage cutoff before the gauge reaches 0%, causing an abrupt shutdown. Run two full calibration cycles as described above; if shutdowns persist below 25%, check that the BIOS is not running a charge-limit profile that artificially caps usable capacity.

Compatible Models

X453 X453MA X453MA-0122CN3530 X453MA-0132DN3530 X453MA-0051AN2830 X553M X553MA F553M D553M X553 P553 P553MA F453 F453MA F453MA-BING-WX430B F453MA-WX429B F453MA-BING414BLK F453MA-WX212B F453MA-WX430B F453MA-WX397B F453MA-BING-WX355B X553SA-XX067T X553SA-XX007D F553MA-XX573H X553SA-XX291T X453MA-2D ET2040IUK-BB015X X453MA-WX162B X553MA-XX172D X553MA-XX452T X553MA-XX690D X453SA-WX007D X453MA-WX237D X553SA-XX120T F553MA-BING-SX417B X553SA-XX055T F553SA-XX124T ET2040IUK-BB015W X453MA-WX115B X553MA-XX090D X553MA-XX366T X553MA-XX549T X453SA-0042DN3700 X453SA-BX402D X453MA-WX584H X553SA-XX031T X553SA-XX137D X453MA-BING-WX122B ET2040IUK-BB027V X453MA-XX060D X553MA-XX212H X553MA-XX490T X553MA-XX716H X453SA-WX061D X453MA-WX315B X553SA-XX191T F553MA-BING-SX672B X553SA-XX167T F553SA-XX149T ET2040IUK-BB006M X453MA-WX117B B06WWPXC3M X553MA-XX102H X553MA-XX397D X553MA-XX651H X453SA-WX006D X453SA-BX404D X453MA-WX428D X553SA-XX171T D553MA-XX180H X553SA-WS01-RD F553SA-XX026T ET2040IUK X453MA-WX024H ET2040IUK-BB059M X453SA-1A X553MA-XX045D X553MA-XX233D X553MA-XX516D X553MA-XX809D X453SA-WX094T X453MA-WX321B X553MA-DB01 Ultrabook X553SA-XX236T F553MA-XX420H X553SA-XX207D X453MA-1A ET2040IUK-BB023W X453MA-WX136B X553MA-XX114T X553MA-XX402T X553MA-XX669D X453SA-WX009D X453MA-WX217D X553SA-XX166T D553MA-XX191H X553SA-XX023D F553SA-XX121T ET2040IUK-C1A X453MA-WX060D ET2040IUK-BB057M X453SA-2C X553MA-XX061H X553MA-XX365H X553MA-XX534H X553MA-XX898B X453SA-WX109T X453MA-WX300T X553SA-1G X553SA-XX021D F553MA-XX421T X553SA-XX285T X453MA-2C ET2040IUK-BB001R X453MA-WX153B X553MA-XX129D X553MA-XX431D X553MA-XX673T X453SA-WX002D X453MA-WX218D X553SA-XX137T X553SA-XX054T F553SA-XX123T ET2040IUK-BB014X X453MA-WX114B X553MA-XX067D X553MA-XX366H X553MA-XX545D X453SA-0021GN3700 X453SA-BX401D X453MA-WX300H X553SA-XX068T X553SA-XX003D F553MA-XX807H X553SA-XX298D X453MA-BING-WX108B ET2040IUK-BB004R X453MA-WX203H X553MA-XX197H X553MA-XX490D X553MA-XX715H X453SA-WX001D X453MA-WX219D X553SA-XX208T F553MA-BING-SX418B X553SA-XX102T F553SA-XX125T ET2040IUK-BB034X X453MA-WX116B B076M3XCC9 X553MA-XX092D X553MA-XX388D X553MA-XX574D X453SA-0032CN3700 X453SA-BX403D X453MA-WX429D X553SA-XX021T D553MA-XX173H X553SA-XX005 F553SA-XX004T X553SA-QP2-CB X453MA-VX026D ET2040IUK-BB071X BATTX553 X553MA-XX220H X553MA-XX504D X553MA-XX717H X453SA-WX004T X453MA-WX320B X553SA-XX234T F553MA-XX168D X553SA-XX169T F553SA-XX191T ET2040IUK-BB062M X453MA-WX131B X553MA-XX112H X553MA-XX402D X553MA-XX652D X453SA-WX065D X453MA-WX216D X453MA-WX462 X553SA-XX168T D553MA-XX190H X553SA-XX006D F553SA-XX095T ET2040IUK-C1 X453MA-WX058D ET2040IUK-BB067M X453SA-1G X553MA-XX046D X553MA-XX352D X553MA-XX530D X553MA-XX827D X453SA-WX155T X453MA-WX305T X553SA-XX025D F553MA-XX421H X553SA-XX252T X453MA-1G ET2040IUK-BB007M X453MA-WX152B X553MA-XX121D X553MA-XX409T X553MA-XX669T X453SA-WX008D X453MA-WX267D X553SA-1A X553SA-XX170T X553SA-XX039T F553SA-XX122T ET2040IUK-CA1 X453MA-WX064D X453SA-2D X553MA-XX063D X553MA-XX365T X553MA-XX538D X553MA-SH91-CB X453SA-WX253 X453MA-WX393H X553SA-BHCLN10 X453SA X553MA-DB01 D553MA F553SA R515M X553SA F553MA X553MA Ultrabook F553 X403

Replaces Part Numbers

B21N1329 0B200-00840000 0B200-00840100 0B200-00840200 0B200-00840400 0B200-00840500 0B200-00840600 0B200-00840700 B21-N1329 C21N1329

Technical Specifications

Voltage7.6V
Amp Hours4000mAh
Capacity4000mAh
Rate30.4Wh
Net Weight145g /5.11 oz
Gross Weight285g /10.05 oz
Approximate Weight285g /10.05 oz
Dimension 227.86 x 70.47 x 7.58mm

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 Asus X453 battery as 0% or "unknown" right after I installed it?

The fuel gauge IC on the X453 has not yet run a learn cycle against the new cell — it is still referencing EEPROM data from the old battery, which returns an invalid or zero reading. This is not a fault with the replacement cell. Do a full discharge to hibernate-cutoff and then charge uninterrupted to 100%; the gauge recalibrates against the new cell's actual voltage curve and the reading normalises.

My X453MA shows the wrong Wh rating in system info after fitting this battery — it reads lower than 30.4Wh. Is the battery underrated?

The Wh figure displayed in Windows or HWiNFO is pulled from the EEPROM on the cell, which stores the manufacturer's rated chemistry value. The new cell's EEPROM may differ slightly from the original OEM figure because cell suppliers use conservative rated values at 0% state-of-charge baseline. Run two full charge-discharge cycles; the reported Wh value will update as the fuel gauge IC builds an accurate capacity map from real measured data.

The X453 stops charging at 80% and never goes higher — is this a faulty cell?

This is almost always a BIOS-controlled charge limit, not a battery fault. Asus notebooks ship with a Battery Health Charging mode in MyASUS or the older Battery Care Function in BIOS, which caps charge at 60% or 80% to reduce cell stress during long periods plugged in. Open MyASUS, go to Battery Health Charging, and set it to Full Capacity Mode. The battery will then charge to 100V — confirm the setting saved and replug the charger.

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