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Gateway NV52 Replacement Battery 11.1V 4400mAh AS09A31

Up to 17% off
New arrival
From $98.99 USD $117.99
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Fits Gateway NV52 and NV5207U through NV5212U; replaces AS09A31, AS09A41, AS09A56, AS09A61, AS09A71, AS09A73, AS09A75, AS09A90.
11.1V 4400mAh lithium-ion cell delivers 48.84Wh total capacity for full system runtime on a single charge.
Connector and locking tab match original Gateway pack orientation; slides into the bay without adapter or modification.
We bench-tested this cell on NV52 hardware; BMS accepted the new pack on first insertion and ramped charge current normally through 80% threshold.
After installation, run one complete 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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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.

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.

Voltage

11.1V

Amp

4400mAh

Gateway NV52 Series — 11.1V Li-ion Replacement Battery (AS09A31)

This is an 11.1V, 4400mAh Li-ion battery that fits the Gateway NV52 and related NV-series laptops. It replaces OEM part numbers AS09A31, AS09A41, AS09A56, AS09A61, AS09A71, AS09A73, AS09A75, and AS09A90. If your original battery no longer holds a charge or drops dead without warning, this cell slots directly into the same bay with the same connector.

  • NV52 series compatibility: Models NV52, NV5207U, NV5211U, NV5212U, and 59 additional NV-series variants all share the same 11.1V three-cell rail, identical BMS handshake protocol, and the same physical connector — that's why one part number covers the entire platform.
  • Bench tested on actual hardware: We cycled this cell through full charge and discharge on a Gateway NV52 board. The BMS accepted the cell without error, the charge circuit ramped normally to 12.6V, and no fault codes triggered during the discharge phase.
  • Post-install calibration on the NV52: After fitting the new cell, run one full discharge until the laptop hibernates, then charge uninterrupted to 100% without interruption. This resets the BIOS battery learn cycle on the NV52 and clears the inaccurate health warning that appears after every cell swap.

Why the NV52 BIOS reports poor battery health after a new cell install

The Gateway NV52 stores battery health data in EEPROM on the battery's internal circuit board. When you swap to a new cell, the BIOS compares live readings against stale data written by the old battery. The mismatch flags the new cell as degraded even though the cell itself is fresh. Running one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100% forces the BIOS to overwrite the old EEPROM values with accurate readings from the new chemistry.

NV52 shutting down at 20–30% charge shown on screen

This is a voltage cliff — when the CPU and display draw full load simultaneously, a degraded or uncalibrated cell cannot sustain the voltage the BMS expects at that state of charge, and the system cuts power to protect itself. The OS fuel gauge IC hasn't yet mapped the new cell's discharge curve, so it reports 25% when the cell is already near its low-voltage cutoff. Run two full calibration cycles — discharge to hibernate, charge to 100% each time — and the fuel gauge IC will remap against the new cell's actual curve. After two cycles, the reported percentage and actual cutoff point should align within a few percent.

Compatible Models

NV52 NV5207U NV5211U NV5212U NV5213U NV5214U NV5215U NV5216U NV53 NV5302U NV5331U NV5332U NV5333U NV5334U NV5335U NV5336U NV5337U NV5356U NV5362U NV5369ZU NV5370U NV5373U NV5376U NV5378U NV5380U NV5381U NV5383U NV5384U NV5385U NV5386U NV5387U NV5388U NV5389U NV5390U NV54 NV5421U NV5423U NV5425U NV5435U NV5453U NV5462U NV5465U NV5468U NV5469ZU NV5470U NV5471U NV5473U NV5474U NV5478U NV56 NV5602U NV5606U NV5610U NV5613U NV5614U NV58 NV5807U NV5810U NV5814U NV5815U NV5820U NV78 NV7802U

Replaces Part Numbers

AS09A31 AS09A41 AS09A56 AS09A61 AS09A71 AS09A73 AS09A75 AS09A90 ASO9A31 ASO9A41 ASO9A56 ASO9A6 ASO9A71 ASO9A73 ASO9A75 ASO9A90

Technical Specifications

Voltage11.1V
Amp Hours4400mAh
Capacity4400mAh
Rate48.84Wh
Net Weight306.1g /10.80 oz
Gross Weight456.1g /16.09 oz
Approximate Weight456.1g /16.09 oz
Dimension 208.30 x 54.08 x 20.31mm

Product Highlights

  • Brand: Gateway
  • 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 Gateway NV52 shows the replacement battery as "0% available (plugged in, not charging)" — what's causing this?

This points to a BMS handshake failure where the BIOS hasn't yet recognised the new cell's EEPROM data. Shut down completely — not restart — remove the AC adapter, hold the power button for 15 seconds to drain residual charge from the board, then reconnect AC only and power on. If the charge circuit still won't engage, the BIOS battery learn cycle needs a trigger: let the battery discharge fully to hibernate, then charge uninterrupted to 100%.

The NV52 fuel gauge is jumping around — showing 60%, then 45%, then 80% within minutes of each other — is the battery faulty?

The fuel gauge IC calibrates against the cell's discharge curve over time, and a brand-new cell has no recorded curve yet — so the IC is interpolating wildly against the old cell's data. This is expected behaviour for the first two or three cycles. Run two full discharges to hibernate followed by uninterrupted charges to 100%, and the IC will lock onto the new cell's actual curve. After two cycles the readings stabilise to within a few percent.

System info on the NV52 is showing the wrong Wh rating — 44Wh instead of 48.84Wh — after fitting the replacement cell. Is something wrong?

The Wh figure shown in system info is pulled from the battery's EEPROM, which stores the rated capacity of the original OEM cell — not the live chemistry of the replacement. The EEPROM value and the actual cell capacity differ because the replacement cell uses current chemistry with a slightly higher energy density than what was written to that register at the factory. The laptop will charge and discharge correctly regardless of the displayed figure. After one full calibration cycle, some BIOS versions on the NV52 will update the Wh field to reflect the actual cell reading.

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