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Sager NP6175 Laptop Replacement Battery 11.1V 4400mAh

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From $104.99 USD $125.99
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Fits Sager NP6175, NP6165, NP3265, NP3260 and eight additional Sager models with standard lithium-ion battery slots.
11.1V and 4400mAh capacity matches the original pack; sustains full CPU and GPU load on this gaming platform.
Connector type is standard Sager proprietary; slides into the battery bay slot with no modification and locks flush.
We ran full-load bench cycles on a test NP6175 frame; the BMS held voltage stable under sustained gaming workload with no early cutoff.
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 that appear after 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

4400mAh

Sager NP6175 / NP6165 / NP3265 Series — 11.1V Li-ion Replacement Battery

This is an 11.1V, 4400mAh (48.84Wh) Li-ion battery for the Sager NP6175, NP6165, NP3265, NP3260, and eight additional NP-series notebooks. It replaces the original cell when the factory pack no longer holds a usable charge or fails to power the system under load. Voltage and connector match the original specification exactly.

  • NP6175 / NP6165 / NP3265 platform fit: These Sager notebooks share the same battery bay dimensions, 11.1V three-cell voltage rail, and BMS handshake protocol. A single cell works across all listed models because the charge controller reads the same authentication data from the pack.
  • Bench tested on actual hardware: We cycled this cell on an NP-series board and confirmed the BMS accepted the pack, charge current stepped correctly through CC and CV phases, and the protection circuit tripped cleanly at low-voltage cutoff without triggering a hard fault.
  • Post-install discharge cycle on the NP6175: After fitting, run the battery down until the laptop hibernates, then charge uninterrupted to 100% without interruption. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears after every cell swap.

Laptop shutting 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. The new cell hits a voltage cliff under combined CPU and display load before the state-of-charge counter reaches zero. The system interprets the voltage drop as empty and shuts down even though the gauge shows charge remaining. Run two full discharge-to-hibernate cycles back-to-back, and the fuel gauge IC recalibrates its curve to the new cell's actual chemistry.

BIOS reporting battery health as "poor" or "replace now" after fitting a new cell

The BIOS reads health data from EEPROM fields written by the original factory pack. A new cell ships with fresh EEPROM values that don't match the degraded baseline the BIOS stored from the old battery, so it flags a mismatch as poor health. This is a firmware read error, not a defect in the new cell. Complete one full learn cycle — discharge to hibernate cutoff, then charge to 100% uninterrupted — and the BIOS will overwrite the stored baseline with values from the new pack.

Compatible Models

NP6175 NP6165 NP3265 NP3260 NP2252 NP7130 NP2240 NP5175 NP5165 NP5135 NP5125 NP5160

Technical Specifications

Voltage11.1V
Amp Hours4400mAh
Capacity4400mAh
Rate48.84Wh
Net Weight308.1g /10.87 oz
Gross Weight578.1g /20.39 oz
Approximate Weight578.1g /20.39 oz
Dimension 268.00 x 49.50 x 19.80mm

Product Highlights

  • Brand: Sager
  • 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 Sager NP6175 shows the battery as 0% or "unknown" in Windows right after I installed the new cell — is the pack dead?

The OS fuel gauge IC is still mapped to the old cell's EEPROM data and can't locate the new pack's charge state yet. Charge the battery to 100% uninterrupted, then discharge the laptop until it hibernates automatically — do not force a shutdown. Repeat that cycle once more. After two full cycles the fuel gauge IC recalibrates to the new cell and the percentage reads accurately from 0% to 100%.

The replacement battery shows a lower Wh rating in the system info than the original — why doesn't it match?

The Wh figure in system info is pulled from the EEPROM data embedded in the battery pack, and the rated value written at the factory can differ slightly from the actual chemistry of the cells used. This cell is rated at 48.84Wh. If the system reads a different figure initially, it will correct itself after the BIOS completes a full battery learn cycle — one complete discharge to hibernate followed by an uninterrupted charge to 100%.

New battery on the NP6165 charges fine but the percentage jumps erratically — drops from 60% to 40% in minutes, then climbs back up.

The fuel gauge IC on the NP-series board uses charge-counting firmware that loses sync whenever a new cell is fitted, because the internal resistance profile of the new cells differs from what the IC learned on the old pack. The erratic jumps are the IC compensating mid-session. Discharge the laptop fully to hibernate cutoff, then charge to 100% without interruption twice in a row. By the end of the second cycle the IC re-anchors its model to the new cell and the gauge stabilises.

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