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HP Envy 13-AD142TU Replacement Battery 7.7V 6900mAh

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From $81.99 USD $100.99
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Fits HP Envy 13-AD142TU and replaces OEM part numbers 921408-271, AB06XL, HSTNN-DB8C, and TPN-I128.
7.7V and 6900mAh capacity delivers 53.13Wh — matching the ultrabook's original power budget for full-day portable work.
Connector is proprietary to HP's Envy 13-AD series; physical slot accepts this cell without modification or adapter.
We bench-tested against the Envy 13-AD142TU board; BMS negotiated correctly on first insertion with no charge-limiting errors.
After installation, 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.
Extended delivery time

Available by SPECIAL ORDER. Delivery for this product typically takes 2 weeks.

Extra Discount: As a thank you for your patience, enjoy an extra 5% off 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

7.7V

Amp

6900mAh

HP Envy 13-AD142TU Series — 7.7V Li-Polymer Replacement Battery (921408-271)

This 7.7V, 6900mAh (53.13Wh) lithium-polymer battery replaces OEM part 921408-271 in the HP Envy 13-AD142TU and over 260 compatible Envy 13-AD series ultrabooks. It matches the original connector, BMS handshake protocol, and voltage rail so the BIOS recognises it on first boot. Compatible OEM cross-references include AB06XL, HSTNN-DB8C, and TPN-I128.

  • Envy 13-AD series compatibility: The AD-series models — including the AD013NF, AD102NN, and AD181NO — share the same 7.7V power rail, physical form factor, and BMS communication protocol. One cell fits the full bracket of AD-series boards without modification.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on Envy 13-AD hardware. The BMS handshake completed correctly, charge termination triggered at the right voltage ceiling, and the BIOS battery register populated with valid data on first connection.
  • Post-swap learn cycle for the Envy 13-AD: After fitting this battery, 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 Envy 13-AD boards.

BIOS reporting poor battery health immediately after fitting a new cell

The HP Envy 13-AD BIOS reads health data from the battery's EEPROM register, not from live voltage. When you swap cells, the EEPROM on the new battery carries factory baseline data that the BIOS hasn't yet calibrated against. It flags this as "poor health" or "battery not detected correctly" on first boot. Running a full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS to re-index its fuel gauge IC against the new cell's actual capacity curve and clears the warning.

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

This is a voltage cliff problem, not a capacity problem. Under combined CPU and display load, the cell voltage drops faster than the fuel gauge IC predicts — especially during the first few cycles on a new cell. When the voltage hits the BMS low-voltage cutoff threshold, the board shuts down even though the OS still shows charge remaining. Run two to three full discharge and recharge cycles without interrupting the charge above 80%. This recalibrates the fuel gauge IC and aligns the displayed percentage with the cell's actual voltage curve.

Compatible Models

Envy 13-AD142TU Envy 13-AD013NF Envy 13-AD181NO Envy 13-AD102NN Envy 13-AD024UR ENVY 13-AD026TU Envy 13-AD102NB Envy 13-ad101ns Envy 13-AD055TU Envy 13-AD002NC Envy 13-AD075TU Envy 13-AD104NW Envy 13-AD005NX Envy 13-AD007NS Envy 13-AD113NF Envy 13-AD123TU Envy 13-AD011NA Envy 13-AD135TU Envy 13-AD012NO Envy 13-AD160TU Envy 13-AD016NF Envy 13-AD103NW Envy 13-AD034UR 2EX78PA Envy 13-AD052TU Envy 13-AD001NE Envy 13-AD066TU Envy 13-AD003NF Envy 13-AD098NIA Envy 13-AD004TU Envy 13-AD106NE Envy 13-AD006NS Envy 13-AD109TU Envy 13-AD008NP Envy 13-AD116UR Envy 13-ad010ng Envy 13-AD144TU Envy 13-AD013NO Envy 13-AD192ND Envy 13-AD102NF Envy 13-ad030ng ENVY 13-AD028TU Envy 13-AD044NZ Envy 13-ad112nd Envy 13-AD057NR Envy 13-AD002NF Envy 13-AD078TU Envy 13-ad004ng Envy 13-AD104TU Envy 13-AD005UR Envy 13-AD107TU Envy 13-AD007NV Envy 13-AD113TU Envy 13-AD009NV Envy 13-AD131ND Envy 13-AD011NN Envy 13-AD138TU Envy 13-AD012TU Envy 13-AD154NZ Envy 13-AD102NC Envy 13-AD023NF Envy 13-ad065nr Envy 13-AD036UR 2EX87PA Envy 13-AD053TX Envy 13-AD001NK Envy 13-AD068TU Envy 13-AD003NI Envy 13-AD099NIA Envy 13-AD004UR Envy 13-AD106NIA Envy 13-AD006UR Envy 13-AD110NF Envy 13-AD008NW Envy 13-AD119TU Envy 13-AD010NR Envy 13-AD011UR Envy 13-AD149NZ Envy 13-AD013TU ENVY 13-ad003la Envy 13-AD019NF Envy 13-AD031ND 2EX85PA Envy 13-AD046TU ENVY 13-ad060na Envy 13-AD058TU Envy 13-AD002NK Envy 13-AD080NG Envy 13-AD004NN Envy 13-AD105NN Envy 13-AD108NS Envy 13-AD007TX Envy 13-AD114ND Envy 13-AD100NE Envy 13-AD127TU Envy 13-ad140ng Envy 13-AD101NP Envy 13-AD174TU Envy 13-AD102NX Envy 13-AD023UR ENVY 13-AD019TU Envy 13-AD037UR Envy 13-ad106ns Envy 13-AD054TU Envy 13-AD001NX Envy 13-AD070TU Envy 13-AD003NO Envy 13-AD104NC Envy 13-AD005NN Envy 13-AD106NN Envy 13-AD007NF Envy 13-AD111TU Envy 13-AD100ND Envy 13-AD120TU Envy 13-AD010NV Envy 13-AD012NC Envy 13-AD156TU Envy 13-AD014NF Envy 13-AD020TU Envy 13-AD032TU 2EX79PA Envy 13-AD050NZ Envy 13-AD060TU Envy 13-AD002NX Envy 13-AD081ND Envy 13-AD004NS Envy 13-AD105NX Envy 13-AD006NN Envy 13-AD109NF Envy 13-AD008NB Envy 13-AD114TU Envy 13-AD100NS Envy 13-AD132ND Envy 13-AD101NE Envy 13-AD181ND Envy 13-AD102NS Envy 13-AD024NF ENVY 13-AD022TU Envy 13-AD040TU ENVY 13-ad107ns Envy 13-AD055NR Envy 13-AD002NA Envy 13-AD074TU Envy 13-AD003TU Envy 13-AD104NN Envy 13-AD005NS Envy 13-AD106NW Envy 13-AD007NO Envy 13-AD112UR Envy 13-AD009NF Envy 13-AD122TU Envy 13-AD010UR Envy 13-AD133TU Envy 13-AD012NF Envy 13-AD159TU Envy 13-AD016NC Envy 13-AD021TU Envy 13-AD033UR 2EX80PA Envy 13-AD051TU Envy 13-AD000UR Envy 13-AD063TU Envy 13-AD003NE Envy 13-AD098NB Envy 13-AD004NX Envy 13-ad105ng Envy 13-AD006NP Envy 13-AD109NW Envy 13-AD008NO Envy 13-AD116TU Envy 13-AD010ND Envy 13-AD143TU Envy 13-AD101NC Envy 13-AD192MS Envy 13-AD102NL Envy 13-AD029TU ENVY 13-AD027TU Envy 13-AD042TU Envy 13-ad110ns Envy 13-AD056NR Envy 13-AD002NE Envy 13-AD076TU Envy 13-AD004NF Envy 13-AD104NX Envy 13-AD005TX Envy 13-AD107NW Envy 13-AD007NT Envy 13-AD113NS Envy 13-ad009ns Envy 13-AD125TU Envy 13-AD011NF Envy 13-AD136TU Envy 13-AD012NS Envy 13-AD163TU Envy 13-AD016TU Envy 13-AD103NO Envy 13 2017 Envy 13-AD036TU 2EX86PA Envy 13-AD053TU Envy 13-AD001NIA Envy 13-AD067TU Envy 13-ad003ng Envy 13-AD098NP Envy 13-AD004TX Envy 13-AD106NF Envy 13-AD006NW Envy 13-AD110CA Envy 13-AD008NS Envy 13-AD117TU Envy 13-AD010NO Envy 13-AD145TU Envy 13-AD013NS ENVY 13-ad007la Envy 13-AD019NC Envy 13-AD030UR ENVY 13-AD025TU Envy 13-AD046NZ Envy 13-ad038tu Envy 13-AD057TU Envy 13-ad002ng Envy 13-AD079TU Envy 13-AD004NJ Envy 13-AD105NL Envy 13-AD006NF Envy 13-AD108NI Envy 13-AD007NX Envy 13-AD113UR Envy 13-AD100NI Envy 13-AD126TU Envy 13-AD011NS Envy 13-AD139TU Envy 13-AD101NT Envy 13-AD173TU Envy 13-AD017NF Envy 13-AD103NC Envy 13-AD100NK Envy 13-AD054NZ Envy 13-AD001NO Envy 13-AD069TU Envy 13-AD003NK Envy 13-AD104NB Envy 13-AD005NF Envy 13-AD106NJ Envy 13-AD007NB Envy 13-AD110UR Envy 13-AD100CA Envy 13-AD120NR Envy 13-AD010NS Envy 13-AD101NX Envy 13-AD155TU Envy 13-AD100NX ENVY 13-AD007TU Envy 13-AD020NF Envy 13-AD031TU 2EX88PA Envy 13-AD047TU Envy 13-AD059NA Envy 13-AD002NW Envy 13-ad080nz Envy 13-AD004NO Envy 13-AD105NS Envy 13-AD006NL

Replaces Part Numbers

921408-271 921408-2C1 921438-855 AB06053XL AB06XL HSTNN-DB8C TPN-I128 TPNI128

Technical Specifications

Voltage7.7V
Amp Hours6900mAh
Capacity6900mAh
Rate53.13Wh
Net Weight233.8g /8.25 oz
Gross Weight493.8g /17.42 oz
Approximate Weight493.8g /17.42 oz
Dimension 282.50 x 109.60 x 7.16mm

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-AD shows the new battery as 0% or "unknown" in Windows after fitting it — what's wrong?

The fuel gauge IC in the Envy 13-AD reads EEPROM data from the old cell during normal operation and loses its calibration reference when you swap batteries. Windows reports 0% or "unknown" because the IC hasn't yet mapped its charge curve against the new cell's chemistry. Shut down completely, let the battery discharge to hibernate-cutoff over one uninterrupted session, then charge to 100% without unplugging. After that cycle, the fuel gauge IC re-initialises and Windows displays accurate percentages.

The battery percentage jumps around wildly for the first few days — is the cell faulty?

The cell is not faulty. The Envy 13-AD fuel gauge IC uses a learning algorithm that builds an accurate charge curve over two to three full cycles against a new cell. Until those cycles complete, the IC extrapolates from old data and the percentage reading swings unpredictably — especially between 40% and 70%. Run three complete discharge-to-hibernate and full-charge cycles without stopping mid-charge. The readings stabilise once the IC has enough real data from the new cell to calculate remaining capacity accurately.

Windows shows this battery as 53Wh but HP Support Assistant is reporting a different Wh figure — which is correct?

HP Support Assistant pulls Wh data from the battery's EEPROM, which stores the rated factory figure from the original OEM cell profile. The 53.13Wh figure in this battery's specification reflects the actual measured capacity of the replacement cell at 7.7V and 6900mAh. A small discrepancy between EEPROM-reported and calculated Wh is normal across replacement cells and does not affect charging, BMS behaviour, or usable capacity. Trust the calculated figure: 7.7V × 6.9Ah = 53.13Wh.

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