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Gateway GWTN156-11BK Laptop Compatible Battery 7.6V 5000mAh

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Fits Gateway GWTN156-11BK laptop; replaces OEM part numbers 5080270P, U3576127, U3576127PV, and U3576127PV-2S1P.
7.6V, 5000mAh lithium-polymer cell restores full charge capacity on this 15.6-inch Gateway notebook.
Connector orientation matches the original battery slot; locking tab seats flush against the laptop frame.
We bench-tested the cell on Gateway's charge controller; BMS accepted the new pack without 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 that appear after every cell swap.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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

7.6V

Amp

5000mAh

Gateway GWTN156-11BK — 7.6V Li-Polymer Replacement Battery (5080270P)

This 7.6V, 5000mAh (38Wh) lithium-polymer cell replaces the original battery in the Gateway GWTN156-11BK laptop. It fits directly using OEM part numbers 5080270P, U3576127, U3576127PV, and U3576127PV-2S1P. Voltage, connector, and BMS communication match the original specification.

  • GWTN156-11BK fit: Gateway built this 15.6-inch notebook around a 2S1P lithium-polymer pack at 7.6V nominal. The BMS handshake, connector pinout, and physical footprint are specific to this chassis — this cell matches all three.
  • Bench tested on actual hardware: We ran the cell through charge and discharge on the GWTN156-11BK platform. The BMS accepted the new cell without fault flags, and the charge controller cycled to full capacity without thermal events or cutoff errors.
  • Post-install calibration on the GWTN156: After fitting this cell, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. 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 after replacement on the GWTN156-11BK

When the GWTN156-11BK reads a new cell for the first time, the BIOS compares live EEPROM data against the stored profile from the old pack. Because the new cell has no discharge history, the firmware flags it as degraded or unknown — this is a data mismatch, not a fault with the cell itself. Running a full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS to write a fresh baseline to the fuel gauge IC. After one or two full cycles, the health status will update to normal. If the warning persists past three full cycles, check that BIOS firmware is current — Gateway issued updates that affect battery health reporting on this model.

Laptop shuts down at 20–30% remaining after battery swap

This happens because the fuel gauge IC is still calibrated to the old cell's discharge curve. Under full CPU and display load, the new cell's voltage drops faster than the stale profile expects — the system reads the voltage cliff as imminent shutdown and cuts power early. The fix is a calibration cycle: let the laptop discharge fully to automatic hibernate, then charge to 100% without interruption. Repeat this two to three times. After calibration, the fuel gauge IC maps the new cell's actual voltage curve and the premature shutdowns stop.

Compatible Models

GWTN156-11BK

Replaces Part Numbers

5080270P U3576127 U3576127PV U3576127PV-2S1P

Technical Specifications

Voltage7.6V
Amp Hours5000mAh
Capacity5000mAh
Rate38Wh
Net Weight152g /5.36 oz
Gross Weight412g /14.53 oz
Approximate Weight412g /14.53 oz
Dimension 298.00 x 105.00 x 4.80mm

Product Highlights

  • Brand: Gateway
  • 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 Gateway GWTN156-11BK shows the new battery as 0% or "unknown" in Windows — what's causing that?

The fuel gauge IC in this laptop retains EEPROM data from the old cell and cannot immediately interpret the new pack's state of charge. Windows pulls that uncalibrated reading and displays it as 0% or unknown. Run the laptop down to hibernate on battery, then charge uninterrupted to 100% — this forces the IC to write a fresh calibration baseline. After one full cycle the percentage readout should normalise; two to three cycles will bring it within a few percent of accuracy.

Windows reports this battery as 38Wh but the system info panel shows a different Wh rating — is the cell wrong?

The Wh figure shown in Windows Device Manager or third-party tools is pulled from the EEPROM on the original cell's BMS — it reflects what the old pack reported, not the new cell's actual rating. This cell is rated at 38Wh, which matches the OEM specification for the GWTN156-11BK. The discrepancy is a firmware read of stale stored data, not a mismatch in the physical cell. After a full calibration cycle, battery reporting tools will read the new cell's actual data correctly.

The GWTN156-11BK stopped charging above 80% after the battery swap — is the new cell defective?

This is almost always a BIOS charge-limit setting, not a cell fault. Gateway's firmware includes a battery care mode that caps charging at 80% to reduce long-term wear — it carries over after a swap because it is stored in BIOS, not in the battery itself. Go to the Gateway laptop settings utility or check BIOS under Power Management and disable the charge limit or set it to 100%. Once the cap is off, the cell will charge to full capacity without issue.

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