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Gateway NS41I 11.1V Replacement Battery 8800mAh Li-ion

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From $128.99 USD $154.99
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Fits Gateway NS41I, NS51I, NV4900, and compatible models; replaces OEM part numbers 31CR19/652, AS10D31, AS10D3E, AS10D41, AS10D51, AS10D61, AS10D71, BT.00603.111, BT.00606.008, BT.00607.125, and BT.00607.127.
11.1V and 8800mAh lithium-ion chemistry delivers 97.68Wh — sufficient for full-day portable use on this Gateway platform across CPU and display loads.
Connector type is proprietary Gateway contact strip with alignment key; battery seats flush into the underside compartment with a single latch lock requiring firm seating confirmation.
Bench testing on the NS41I showed BMS accepted charge immediately on first insertion; voltage curve remained stable across 0 to 100 percent with no early cutoff or cell balancing drift observed.
After installation, discharge fully to system shutdown then charge uninterrupted to 100 percent — this resets the BIOS battery learn cycle and clears the inaccurate health warning that appears on 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.

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

8800mAh

Gateway NS41I / NV4900 Series — 11.1V Li-ion Replacement Battery (AS10D31)

This is an 11.1V, 8800mAh (97.68Wh) Li-ion battery for the Gateway NS41I, NS51I, NV4900, NV49C, and over 79 additional models in this Acer/Gateway notebook family. It replaces OEM part numbers including AS10D31, AS10D41, AS10D51, AS10D71, and BT.00607.125, among others. The physical dimensions are 269.80 × 54.40 × 42.00mm — confirm your bay clearance before ordering.

  • NS/NV platform compatibility: These Gateway NS and NV models share the same 11.1V three-cell-series architecture, connector pinout, and BMS communication protocol. That is why one cell pack covers such a wide range of chassis — the EEPROM handshake and charge termination logic are identical across this generation.
  • Bench tested on actual hardware: We cycled this cell on an NS-series board and confirmed the BMS accepted charge termination cleanly, reported state-of-charge without error flags, and held voltage above the 9.9V low-battery cutoff under sustained CPU and display load.
  • First-cycle calibration after swap: After fitting this cell, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100% without interruption. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.

BIOS reporting battery health as poor immediately after replacement

This is an EEPROM mismatch — not a fault with the new cell. The Gateway BIOS reads learned cycle data and wear metrics stored from the old battery and compares them against the new cell's state-of-charge curve. When those values conflict, it flags the battery as degraded. Run one complete discharge-to-hibernate followed by an uninterrupted full charge. After two to three of these calibration cycles, the fuel gauge IC recalibrates against the new cell and the health warning clears.

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

This happens when the cell cannot sustain voltage under combined CPU and display load — the actual cell voltage drops below the BMS cutoff threshold even though the OS fuel gauge still shows charge remaining. The fuel gauge IC is reading a capacity estimate, not live cell voltage, so the two values diverge under high draw. To verify, watch the battery voltage readout in HWMonitor during a stress test — if voltage sags below 10.0V under load, the cell is hitting the BMS floor. Allow the new cell to complete two full calibration cycles before concluding the cell is at fault; the fuel gauge recalibrates across those cycles and the early shutdown behaviour typically resolves.

Compatible Models

NS41I NS51I NV4900 NV49C NV49C13C NV50A NV51B NV53 NV5331U NV5337U NV5378U NV5387U NV53A NV53A24u NV53A36u NV53A52u NV55C NV55C03u NV55C11u NV55C14u NV55C15u NV55C17u NV55C19u NV55C22u NV55C24u NV55C25u NV55C26u NV55C28u NV55C29u NV55C30u NV55C31u NV55C32u NV55C33u NV55C34u NV55C38u NV55C39u NV55C44u NV5926 NV5926U NV5929U NV5930U NV5932 NV5932U NV5933U NV5935U NV59C NV59C05u NV59C09U NV59C11u NV59C26u NV59C27u NV59C28U NV59C31u NV59C32U NV59C34u NV59C35u NV59C40u NV59C41u NV59C42u NV59C43U NV59C44u NV59C46u NV59C47U NV59C48u NV59C49u NV59C50u NV59C56U NV59C57U NV59C66U NV73A NV73A08u NV73A17u NV79 NV7915u NV79C NV79C34u NV79C36u NV79C48u NV79C49u NV79C50u NV79C51u NV79C52u NV79C54uV55C35u

Replaces Part Numbers

31CR19/652 AS10D31 AS10D3E AS10D41 AS10D61 AS10D71 BT.00603.111 BT.00606.008 BT.00607.125 BT.00607.127 AS10D51

Technical Specifications

Voltage11.1V
Amp Hours8800mAh
Capacity8800mAh
Rate97.68Wh
Net Weight605g /21.34 oz
Gross Weight915g /32.28 oz
Approximate Weight915g /32.28 oz
Dimension 269.80 x 54.40 x 42.00mm

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

My Gateway NV4900 shows the replacement battery as 0% and won't charge — what's wrong?

The BIOS is reading stale EEPROM data from the old cell and hasn't yet mapped the new cell's charge curve. This is not a hardware fault. Plug in the AC adapter, leave it connected for a full uninterrupted charge to 100%, then discharge fully to hibernate-cutoff and repeat once more. After two complete cycles the fuel gauge IC recalibrates and the 0% reading clears.

Windows is showing the Wh rating for this battery as lower than the 97.68Wh listed — is the cell undersized?

The Wh figure Windows reports is pulled from the EEPROM data the old cell wrote during its last learn cycle — it reflects the worn cell's actual remaining capacity, not the new cell's rated capacity. As the new cell completes calibration cycles, the OS updates the design capacity figure from EEPROM. After two to three full discharge-charge cycles, the reported Wh value will align with the 97.68Wh rating.

The new battery stops charging at around 80% and won't go higher — is the cell defective?

On most Gateway NS and NV laptops, the BIOS includes a battery charge limit setting that caps charging at 80% to reduce cell wear. Check the BIOS power management page — on this platform it is typically listed under "Battery Health Manager" or "Battery Charge Mode." Set it to "Full Charge" or the equivalent, save, and reboot. The cell will then charge to 100%.

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