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HP Envy 13 HSTNN-IB99 Compatible Battery 14.8V 2700mAh

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From $124.99 USD $149.99
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Fits HP Envy 13 ultrabooks; replaces OEM part HSTNN-IB99, HSTNN-XB99, 519249-171, 538334-001, HSTNN-Q41C, BD04.
14.8V 2700mAh lithium-polymer pack delivers 39.96Wh; matches the original cell voltage and capacity for full portability restoration.
Connector slides straight into the battery slot with a single locking tab; no adapter or modification needed.
Bench testing showed clean BMS handshake on first insertion; charge acceptance ramped normally without voltage sag or cutoff errors.
After installation, run one full discharge to sleep mode then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears false low-health warnings that appear after every cell swap.
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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

14.8V

Amp

2700mAh

HP Envy 13 Series — 14.8V Li-Polymer Replacement Battery (HSTNN-IB99)

This is a 14.8V, 2700mAh (39.96Wh) Li-Polymer battery for the HP Envy 13 ultrabook lineup. It fits the Envy 13, Envy 13-1000, Envy 13-1001TX, Envy 13-1002TX, and over 20 additional Envy 13 variants. OEM cross-references include HSTNN-IB99, HSTNN-XB99, BD04, and 538334-001.

  • Envy 13 series compatibility: These models share a common 14.8V four-cell Li-Polymer architecture, the same physical connector pinout, and an identical BMS handshake protocol — which is why one cell services the entire Envy 13-1000 sub-series without modification.
  • Bench tested on actual hardware: We cycled this cell through full charge and controlled discharge on an Envy 13-1000 chassis. The BMS negotiated charge correctly, cell balancing stayed within spec, and no overcurrent trips occurred across the full discharge curve.
  • First-install cycle on the Envy 13: After fitting, 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 swapping cells in these models.

BIOS reporting poor battery health immediately after fitting a new cell

HP's BIOS reads health data stored in the battery's EEPROM, not from live cell measurements. When a new cell is installed, the EEPROM profile doesn't match the host system's charge history, so the BIOS flags the battery as degraded or unknown before a single cycle runs. This is a data mismatch, not a faulty cell. Run one full discharge-to-hibernate then a full uninterrupted charge to 100% — the BIOS learn cycle rewrites its reference data and the health warning clears.

Envy 13 shuts down abruptly at 20–30% charge shown on screen

This happens when the cell can no longer hold voltage under combined CPU and display load — the voltage drops below the BMS cutoff threshold even though the fuel gauge still reads 20–30%. The fuel gauge IC calculates remaining charge from a model built on the old cell's behaviour, so its readout lags behind actual cell state. The fix is calibration: let the laptop discharge fully to automatic hibernate, then charge uninterrupted to 100% twice. After two calibration cycles the fuel gauge IC recalibrates against the new cell and shutdown below 30% stops.

Compatible Models

Envy 13 Envy 13-1000 Envy 13-1001TX Envy 13-1002TX Envy 13-1003XX Envy 13-1004TX Envy 13-1005TX Envy 13-1006TX Envy 13-1007EV Envy 13-1007LA Envy 13-1007TX Envy 13-1008TX Envy 13-1010ER Envy 13-1015ER Envy 13-1030CA Envy 13-1030NR Envy 13-1050EA Envy 13-1050EF Envy 13-1050EG Envy 13-1050ES Envy 13-1099EO Envy 13-1099XL Envy 13-1100 Envy 13-1940EZ Envy 13T-1000 Envy 13T Envy 13T-1100

Replaces Part Numbers

HSTNN-IB99 HSTNN-XB99 519249-171 538334-001 HSTNN-Q41C BD04

Technical Specifications

Voltage14.8V
Amp Hours2700mAh
Capacity2700mAh
Rate39.96Wh
Net Weight343.9g /12.13 oz
Gross Weight483.9g /17.07 oz
Approximate Weight483.9g /17.07 oz
Dimension 210.35 x 114.62 x 8.30 mm

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 Envy 13 shows the new battery as 0% or "unknown" in Windows — is the cell dead on arrival?

It isn't. The Windows fuel gauge IC is reading EEPROM data from the old cell's charge history, and the mismatch causes it to report 0% or an unknown state. Plug in the charger and leave it connected until Windows shows 100%, then discharge fully to hibernate-cutoff without interrupting the process. After one complete cycle the fuel gauge recalibrates against the new cell and the reading normalises.

The Envy 13 BIOS shows the battery Wh rating as lower than the spec — why doesn't it match the 39.96Wh on the label?

The BIOS pulls the Wh figure from the EEPROM embedded in the battery pack, and EEPROM values are programmed at the cell factory using rated chemistry data — not measured from the actual cells installed. Small differences between EEPROM-rated Wh and the real cell capacity are normal and do not indicate a fault. The BIOS figure will not change; confirm actual capacity by running a calibration cycle and checking the discharge curve rather than the BIOS readout.

Why did the Envy 13 stop charging at 80% after I replaced the battery — is the new cell rejecting the charger?

The cell is fine. HP's BIOS includes a charge limit setting called "Battery Health Manager" that caps charging at 80% to reduce long-term cell stress — this setting persists across battery swaps. Open HP Support Assistant or the BIOS setup menu (F10 at boot), navigate to Power settings, and set the charge limit to "Maximum charge" or "Let HP manage." The charger will then run the cell to 100%.

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