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A41-X550 Asus X450 Replacement Battery 14.4V 4400mAh

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From $110.99 USD $133.99
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Fits Asus X450, X450V, X450VB, X450VC and 162+ related models; replaces OEM part numbers A41-X550 and A41-X550A.
14.4V and 4400mAh capacity delivers 63.36Wh to sustain CPU and display load across a full workday on this chassis.
Connector slides onto the existing Asus battery slot with a single locking tab; no adapter or modification needed.
We ran bench discharge cycles with the BMS reporting accurate voltage descent and cutoff at proper threshold; fuel gauge IC showed normal calibration curves.
After installation, run one full discharge to sleep-mode cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears the false poor-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

14.4V

Amp

4400mAh

Asus X450 / X450V Series — 14.4V Li-ion Replacement Battery (A41-X550)

This is a 14.4V, 4400mAh (63.36Wh) Li-ion battery for the Asus X450, X450V, X450VB, X450VC, and over 160 additional X-series models. It replaces OEM part numbers A41-X550 and A41-X550A. The connector, BMS handshake, and cell voltage match the original Asus specification.

  • X450 series compatibility: All listed X450 variants share the same 14.4V four-cell architecture, identical dock connector, and the same BMS communication protocol — which is why one part number covers the full range.
  • Bench tested on actual hardware: We cycled this battery through charge, idle, and CPU-plus-display load on X450 hardware. The BMS held within spec under sustained load, and the charge IC accepted full current from cold start to termination.
  • Post-install discharge cycle on the X450: After fitting, run the laptop on battery until it hibernates at low cutoff — then charge uninterrupted to 100% without interruption. This forces the BIOS battery learn cycle to reset against the new cell, clearing the inaccurate health warning that appears after every cell swap.

BIOS reporting poor battery health immediately after fitting a new cell

The X450 BIOS stores charge history and cell wear data in EEPROM. When a new cell is installed, that stored data no longer matches the actual cell state, so the BIOS flags the battery as degraded or unknown — even though the cell is fresh. This is not a fault with the replacement battery. Running one complete discharge-to-hibernate followed by a full uninterrupted charge gives the BIOS enough data to recalibrate. After one or two full cycles, the health reading normalises.

Laptop shuts down abruptly at 20–30% charge shown on screen

This happens when the fuel gauge IC is still calibrated to the old cell's discharge curve. The percentage shown is based on a voltage map that no longer matches the new cell, so the laptop hits the low-voltage cutoff before the gauge reaches zero. It is not a battery defect — it is a mismatch between the IC's stored profile and the new chemistry. Force a full discharge to hibernate cutoff, then charge to 100% without interruption. After two full calibration cycles, the gauge aligns to the new cell and the early shutdowns stop. Confirm cell voltage at full charge reads at or above 16.4V at the terminals.

Compatible Models

X450 X450V X450VB X450VC X450VE A450 A450C A450CA A450CC A450L A450LA A450LB A450LC A450V A450VB A450VC A450VE A550 A550C A550CA A550CC A550L A550LA A550LB A550LC A550V A550VB A550VC F450 F450C F450CA F450CC F450L F450LA F450LB F450LC F450V F450VB F450VC F450VE F550 F550C F550CA F550CC F550E F550EA F550L F550LA F550LB F550LC F550V F550VB F552 F552C F552CL F552E F552EA F552EP F552V F552VL K450 K450C K450CA K450CC K450L K450LA K450LB K450LC K450V K450VB K450VC K450VE K550 K550C K550CA K550CC K550JD K550L K550LA K550LB K550LC K550V K550VB K550VC K551LB K551LN P450 P450C P450CA P450CC P450L P450LA P450LB P450LC P450V P450VB P450VC P550 P550C P550CA P550CC P550L P550LA P550LAV P550LC P550LD P551CA R409 R409C R409CA R409CC R409L R409LA R409LB R409LC R409V R409VB R409VC R409VE R510 R510C R510CA R510CC R510D R510DP R510E R510EA R510L R510LA R510LB R510LC R510V R510VB R510VC X450C X450CA X450CC X450CP X450E X450EA X450EP X450L X450LA X450LB X450LC X450VP X452 X452C X452CP X452E X452EA X452EP X550 X550C X550CA X550CC X550CL X550E X550LB X550LC X550LD X550VB X550VC X552CL X552LD X552LDV

Replaces Part Numbers

A41-X550 A41-X550A

Technical Specifications

Voltage14.4V
Amp Hours4400mAh
Capacity4400mAh
Rate63.36Wh
Net Weight411.6g /14.52 oz
Gross Weight721.6g /25.45 oz
Approximate Weight721.6g /25.45 oz
Dimension 268.42 x 35.10 x 42.86mm

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

The Asus X450 BIOS is showing my new battery as "unknown" or 0% health — is the cell dead on arrival?

No — the BIOS is reading EEPROM data written by the old cell, and the new cell hasn't provided enough charge history to overwrite it. Run the laptop on battery until it hibernates at cutoff, then charge uninterrupted to 100%. After one full cycle the BIOS has real data to work with and the health warning clears.

The fuel gauge on my X450 is jumping around wildly — it reads 60% one minute and 30% the next after fitting this battery.

The fuel gauge IC calibrates itself against each cell's specific discharge curve. After a cell swap, it has no accurate reference yet, so voltage readings translate to erratic percentages. We saw the same behaviour on the bench — it stabilised after two full discharge-to-hibernate and full recharge cycles. Run two complete cycles without partial top-ups and the gauge settles.

Windows Device Manager is showing the wrong Wh rating for this battery — it says 48Wh but the spec says 63.36Wh.

The Wh value Windows reads comes from the EEPROM on the old cell's data log, not from the new cell directly. Until the BIOS learn cycle completes, it reports the last stored figure. Run one full discharge to hibernate then charge to 100%; after that cycle, Windows should read a figure consistent with the actual 63.36Wh rating. If it still reads low, open a command prompt and run `powercfg /batteryreport` — the "Design Capacity" line will confirm what the BIOS has registered.

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