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HP 996QA166H Laptop Replacement Battery 15.4V 2950mAh

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From $85.99 USD $105.99
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Fits HP laptops using 996QA166H, HSTNN-IB9B, L71493-1C1, L71607-005, UG04XL, or UG04046XL part numbers.
15.4V 2950mAh lithium-polymer cell delivers 45.43Wh for standard unplugged work sessions on your HP notebook.
Connector slides straight in with single retention latch — no tools needed, seats flush against the battery bay slot.
We ran this cell through a full discharge-to-cutoff cycle on an HP EliteBook and confirmed the BMS accepted the handshake without error codes.
After installation, run one full discharge to hibernation followed by continuous charge to 100% — this resets the BIOS battery learn cycle and clears the false 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

15.4V

Amp

2950mAh

HP UG04XL — 15.4V Li-Polymer Replacement Battery (996QA166H / HSTNN-IB9B)

This is a 15.4V, 2950mAh (45.43Wh) lithium-polymer replacement battery for HP notebooks and laptops using OEM part numbers 996QA166H, HSTNN-IB9B, L71493-1C1, L71607-005, UG04XL, or UG04046XL. It replaces a degraded original cell that no longer sustains charge under normal laptop load. Confirm your part number on the underside of the original battery before ordering.

  • OEM part number cross-reference: These part numbers — 996QA166H, HSTNN-IB9B, L71493-1C1, L71607-005, UG04XL, UG04046XL — all reference the same 15.4V four-cell LiPo pack. HP uses multiple internal codes for the same battery across procurement runs; the connector pinout, BMS handshake protocol, and voltage rail are identical across all variants.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on compatible HP hardware. The BMS communicated correctly with the system board, charge acceptance was normal from 0% to 100%, and no fault codes were triggered during the test sequence.
  • Post-install calibration: 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 — skipping this step leaves the fuel gauge reading stale data from the old cell.

BIOS reporting battery health as poor immediately after replacement

HP's BIOS stores battery health data in the EEPROM of the original cell. When a new cell is installed, the BIOS compares its learned data against the new EEPROM and flags a mismatch as poor health. This is not a fault with the replacement battery — it is a calibration state. Run one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100%, and the BIOS will re-learn the new cell's capacity curve and clear the warning.

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

This happens when the fuel gauge IC has not yet calibrated against the new cell's voltage curve. The displayed percentage does not match the cell's actual state of charge, so the system hits the low-voltage cutoff before the gauge reaches 0%. The fix is two to three full discharge-to-hibernate and full-recharge cycles — each pass gives the fuel gauge IC fresh data to recalculate the curve. After calibration, shutdown should not occur above 5% displayed charge.

Replaces Part Numbers

996QA166H HSTNN-IB9B L71493-1C1 L71607-005 UG04XL UG04046XL

Technical Specifications

Voltage15.4V
Amp Hours2950mAh
Capacity2950mAh
Rate45.43Wh
Net Weight184g /6.49 oz
Gross Weight324g /11.43 oz
Approximate Weight324g /11.43 oz
Dimension 193.10 x 102.00 x 7.40mm

Product Highlights

  • Brand: HP
  • 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

My HP laptop shows the new battery as "unknown" or 0% in Windows immediately after fitting it — what's wrong?

The fuel gauge IC on the new cell has not yet synchronised with the BIOS battery learn cycle. Windows reads the EEPROM data, finds no learned capacity history, and displays unknown or 0% as a default state. Run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. After that cycle, the BIOS writes fresh data to the fuel gauge and the percentage reads correctly.

The replacement battery shows 45Wh in the product listing but Windows reports a lower Wh figure in Battery Report — is the cell underspec?

No. Windows pulls the Wh figure from the EEPROM's "designed capacity" field, which reflects the old cell's worn rating at the time it was last written — not the new cell's actual capacity. Run the full discharge-and-recharge calibration cycle, then check Battery Report again. After calibration, the "full charge capacity" value will update and align with the cell's actual 45.43Wh rating.

Charge stops at exactly 80% and will not go higher — is this a fault with the replacement cell?

This is a BIOS-controlled charge limit, not a battery fault. HP laptops with Battery Care Mode or Adaptive Battery Optimizer enabled cap charge at 80% to reduce long-term cell stress. Open HP Support Assistant or your BIOS settings (F10 at boot), locate the battery charge limit setting, and set it to 100%. The replacement cell will then charge to full capacity.

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