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HP Envy 13-AD159TX Compatible Battery AD03XL 11.55V 50.24Wh

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From $107.99 USD $129.99
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Fits HP Envy 13-AD159TX and related models; replaces OEM part AD03XL and alternate codes 921409-271, 921409-2C1, 921439-855.
11.55V at 4350mAh means this cell matches the original power draw across CPU and display without voltage sag during multitask load.
Connector is a standard three-pin JST-type plug; seats into the battery slot with no locking tab — slides straight in and sits flush against the chassis wall.
We bench-tested the BMS handshake on insertion; the fuel gauge IC accepted the new cell without fault codes and began tracking charge cycles from zero.
After install, run one full discharge to hibernation 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.
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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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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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.

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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

11.55V

Amp

4350mAh

HP Envy 13-AD159TX Series — 11.55V Li-Polymer Replacement Battery (AD03XL)

This is an 11.55V, 4350mAh (50.24Wh) lithium-polymer replacement battery for the HP Envy 13-AD series ultrabook. It fits the Envy 13-AD159TX, AD028UR, AD044TX, AD035TX, and over 220 additional Envy 13-AD variants. OEM cross-references include AD03XL, 921409-271, 921409-2C1, 921439-855, and HSTNN-DB8D.

  • Envy 13-AD series compatibility: These models share the same three-cell Li-Polymer architecture, 11.55V nominal rail, and connector pinout. The BMS handshake protocol and EEPROM data structure are consistent across the AD series, so the same cell works across all listed variants without firmware conflict.
  • Bench tested on actual hardware: We ran this cell on an Envy 13-AD unit and confirmed the BMS negotiated charging current correctly, EEPROM data transferred without error codes, and the fuel gauge IC initialised on first boot without triggering a fault state.
  • First-cycle calibration on the Envy 13-AD: After installing, 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 commonly appears after every cell swap on this platform.

BIOS reporting poor battery health immediately after swap on the Envy 13-AD

The Envy 13 stores battery health metrics in the EEPROM of the original cell. When a new cell is fitted, the BIOS reads no prior cycle history and flags the battery as degraded or unknown. This is a data gap, not a fault with the replacement cell. Running the BIOS battery learn cycle — one full discharge to hibernate-cutoff followed by an uninterrupted charge to 100% — writes new baseline data and clears the warning. After two to three full cycles, the health indicator should return to normal.

Envy 13-AD 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 actual voltage curve. Under combined CPU and display load, the laptop hits a voltage cliff the old calibration data did not account for, and the system triggers an emergency shutdown before the displayed percentage reaches zero. The fix is to complete two or three full discharge-to-hibernate and full-recharge cycles so the fuel gauge IC maps the new cell accurately. After calibration, shutdowns at falsely high percentages stop — confirm the cell is holding above 10.8V under load before ruling out a deeper BMS issue.

Compatible Models

Envy 13-AD159TX Envy 13-AD028UR Envy 13-AD044TX Envy 13-AD035TX Envy 13-AD003NF Envy 13-AD008NX Envy 13-AD014UR Envy 13-AD101NF Envy 13-AD105NW Envy 13-AD112TX Envy 13-AD147TU Envy 13-ad010ng Envy 13-AD123TX Envy 13-AD032UR Envy 13-AD169TX Envy 13-AD039UR Envy 13-ad1xx Envy 13-AD060TX Envy 13-AD005NS Envy 13-AD012UR Envy 13-AD017TX Envy 13-AD104NIA Envy 13-AD140TX Envy 13-AD134TX Envy 13-AD028TX Envy 13-AD162TX Envy 13-AD022TX Envy 13-ad101ng Envy 13-AD033TX Envy 13-AD009NB Envy 13-AD015NW Envy 13-AD101UR Envy 13-AD106NC Envy 13-AD114UR Envy 13-AD148TU Envy 13-AD125TX Envy 13-AD179TX Envy 13-AD100NT Envy 13-AD180TX Envy 13-AD037TX Envy 13-AD002NA Envy 13-AD006NP Envy 13-AD013NC Envy 13-AD018NA Envy 13-AD142TX Envy 13-AD136TX ENVY 13-AD100TX Envy 13-AD024TX Envy 13-AD164TX Envy 13-AD021TX Envy 13-ad105ng Envy 13-AD045TX Envy 13-AD004NO Envy 13-AD009TX Envy 13-AD015UR Envy 13-AD106NX Envy 13-AD115UR Envy 13-AD149TX Envy 13-AD127TX Envy 13-AD151TX Envy 13-AD100NIA Envy 13-AD182TX Envy 13-AD038UR Envy 13-AD001NO Envy 13-AD007NO Envy 13-AD013UR Envy 13-AD105NE Envy 13-AD102NE Envy 13-AD144TX Envy 13-ad006ng Envy 13-AD138TX Envy 13-ad106ng Envy 13-AD170TX Envy 13-AD031TX Envy 13-AD166TX Envy 13-AD020TX Envy 13-AD040TX Envy 13-AD004NX Envy 13-AD010TX Envy 13-AD016UR Envy 13-AD103NS Envy 13-AD107NO Envy 13-AD117UR Envy 13-AD130TX ENVY 13-AD109TX Envy 13-AD155TX Envy 13-AD029TX Envy 13-AD043TX Envy 13-AD035UR Envy 13-AD003NE Envy 13-AD007TX Envy 13-AD014TX Envy 13-AD100UR Envy 13-AD105NO Envy 13-AD111UR Envy 13-AD146TX Envy 13-ad009ng Envy 13-AD122TX ENVY 13-ad113tx Envy 13-AD172TX Envy 13-AD031UR Envy 13-AD168TX Envy 13-AD019TX Envy 13-ad100 Envy 13-AD055TX Envy 13-AD005NN Envy 13-AD012TX Envy 13-AD017NC Envy 13-AD104NF Envy 13-AD108NW Envy 13-AD119TX Envy 13-AD134ND ENVY 13-AD106TX Envy 13-AD160TX Envy 13-AD023TX Envy 13-AD049TX Envy 13-AD034TX Envy 13-AD003NK Envy 13-AD008TX Envy 13-AD015NA Envy 13-AD101NO Envy 13-AD114TX Envy 13-AD147TX Envy 13-ad080nz Envy 13-AD177TX Envy 13-AD100NW Envy 13-AD180NZ Envy 13-AD039TX Envy 13-AD056TU Envy 13-AD005TX Envy 13-AD013NA Envy 13-AD017UR Envy 13-AD104NJ Envy 13-AD109NO Envy 13-AD141TX Envy 13-ad002ng Envy 13-AD135TX ENVY 13-AD101TX Envy 13-AD027TX Envy 13-AD163TX Envy 13-AD021UR Envy 13-ad102ng Envy 13-AD047TX Envy 13-AD004NJ Envy 13-AD009NW Envy 13-AD015TX Envy 13-AD102NK Envy 13-AD106NI Envy 13-AD115TX Envy 13-AD148TX ENVY 13-AD107TX Envy 13-AD126TX Envy 13-AD150TX Envy 13-AD100NO Envy 13-AD181TX Envy 13-AD036TX Envy 13-AD002TX Envy 13-AD006NW Envy 13-AD013NN Envy 13-AD018NF Envy 13-AD105NC Envy 13-AD143TX Envy 13-ad004ng Envy 13-AD137TX Envy 13-ad104ns Envy 13-AD026TX Envy 13-AD165TX Envy 13-AD020UR Envy 13-ad140ng Envy 13-AD042TX Envy 13-AD004NS Envy 13-AD010NB Envy 13-AD016TX Envy 13-AD103NN Envy 13-AD106UR Envy 13-AD117TX Envy 13-AD130NG ENVY 13-AD108TX Envy 13-AD128TX Envy 13-AD152TX Envy 13-AD100NF Envy 13-AD191ND Envy 13-AD038TX Envy 13-AD001TX Envy 13-AD007NT Envy 13-AD014NA Envy 13-AD018UR Envy 13-AD105NF Envy 13-AD110TX Envy 13-AD145TX Envy 13-AD139TX Envy 13-ad150nz Envy 13-AD171TX Envy 13-AD029UR Envy 13-AD167TX Envy 13-AD019UR Envy 13-ad142ng Envy 13-AD050TX Envy 13-AD004TX Envy 13-AD012NA Envy 13-AD017NA Envy 13-AD118UR Envy 13-AD133ND ENVY 13-AD103TX Envy 13-ad009ns Envy 13-AD173CL Envy 13-AD108UR ENVY 13-AD104TX ENVY 13-AD102TX Envy 13-AD104UR Envy 13-AD109NS Envy 13-ad003ng Envy 13-AD102UR ENVY 13-AD105TX Envy 13-AD018TX Envy 13-ad141ng Envy 13-AD105UR Envy 13-AD124TX Envy 13-AD109UR Envy 13-ad007ng Envy 13-AD103UR Envy 13-AD107UR Envy 13-AD003TX Envy 13-ad030ng Envy 13-ad000

Replaces Part Numbers

AD03XL 921409-271 921409-2C1 921439-855 AD03051XL HSTNN-DB8D

Technical Specifications

Voltage11.55V
Amp Hours4350mAh
Capacity4350mAh
Rate50.24Wh
Net Weight206.2g /7.27 oz
Gross Weight466.2g /16.44 oz
Approximate Weight466.2g /16.44 oz
Dimension 282.44 x 87.72 x 6.32mm

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

Windows is showing my new HP Envy 13-AD battery as 0% or "unknown" right after I installed it — is the cell dead?

The old cell's EEPROM held all historical charge data, and the new cell arrives with none of it. Windows reads that absence as a fault and displays 0% or "unknown" rather than a live reading. Run a full discharge to hibernate-cutoff, then charge uninterrupted to 100% — this completes one BIOS learn cycle and gives the fuel gauge IC real data to work from. After one full cycle, the percentage should display correctly.

My Envy 13-AD replacement battery is only charging to 80% and stops — did I get a faulty cell?

This is almost always a BIOS-controlled charge limit, not a fault with the cell itself. HP's battery care feature caps charging at 80% to reduce long-term cell stress, and it activates independently of which cell is installed. Go to HP Support Assistant or the BIOS power settings, find "Battery Care Function" or "Adaptive Battery Optimizer," and disable it or set the limit to 100%. The cell will then charge to full capacity.

The Wh rating showing in Windows for my new Envy 13-AD battery doesn't match what I ordered — why is the number different?

Windows reads the Wh figure stored in the cell's EEPROM, which reflects the rated chemistry value written at the factory. The actual electrochemical capacity of a freshly manufactured cell can sit slightly above or below that figure before the first calibration cycles settle it in. This is an EEPROM reported value versus real-world chemistry difference, not a mismatch in the cell you received. Run two full discharge-recharge cycles and check the value again — most fuel gauge ICs update the stored Wh reading once they have real cycle data to reference.

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