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ET04XL HP EliteBook X360 1020 G2 Replacement Battery 7.7V 6300mAh

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Fits HP EliteBook X360 1020 G2 convertible laptops; replaces OEM part ET04XL and cross-reference numbers 915030-171, 915030-1C1, 915191-855, 915191-955.
This cell delivers 7.7V at 6300mAh (48.51Wh) — matches the original lithium-polymer chemistry and sustains the X360's dual-mode processor and display under full load.
Internal connector seats flush into the battery bay with one retention tab; orientation is keyed and accepts the stock cable without force or modification.
We ran full charge-discharge cycles on the HP firmware; the BMS handshook cleanly, voltage held stable under CPU stress, and cutoff occurred at the BIOS threshold without early dropout.
After installation, discharge the cell fully 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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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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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

6300mAh

HP EliteBook X360 1020 G2 — 7.7V Li-Polymer Replacement Battery (ET04XL)

This is a 7.7V, 6300mAh (48.51Wh) lithium-polymer battery for the HP EliteBook X360 1020 G2 convertible laptop. It replaces OEM part ET04XL and cross-references 915030-171, 915191-855, HSTNN-IB7U, and related part numbers. Confirmed fit covers the 1eq23ea, 1ep69ea, 2tn00es, 4wq57pa, and 30+ additional G2 variants.

  • EliteBook X360 1020 G2 platform fit: All G2 variants on this list share the same 7.7V battery rail, ET04XL connector pinout, and BMS handshake protocol — which is why one part number covers the full model range.
  • Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on the X360 1020 G2 platform. The BMS negotiated correctly, charge termination triggered at rated capacity, and no fault codes appeared in HP Support Assistant.
  • Post-install calibration on the X360 1020 G2: After fitting this battery, run the laptop down to hibernate cutoff under normal use, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that commonly appears after a cell swap on this platform.

BIOS reporting poor battery health immediately after replacement

The HP BIOS reads health data stored in the old cell's EEPROM and compares it against the new cell during the first boot. Because the new cell has no usage history logged, the BIOS flags it as degraded or unknown. This is a firmware calibration gap, not a fault with the replacement cell. Run one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100% — the BIOS battery learn cycle will update its data and the health warning will clear.

Laptop shuts 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 discharge curve. The percentage shown is still mapped to the old cell's behaviour, so the system hits a voltage cliff and cuts power before the gauge reaches zero. It is not a defective cell. Run two or three full discharge-to-hibernate cycles and the fuel gauge IC will recalibrate — after which the displayed percentage and actual cutoff will align. Check that actual cell voltage at shutdown is not dropping below 6.0V, which would indicate a separate issue.

Compatible Models

Elitebook X360 1020 G2-1eq23ea Elitebook X360 1020 G2(1ep69ea) Elitebook X360 1020 G2(2tn00es) Elitebook X360 1020 G2-4wq57pa Elitebook X360 1020 G2-z2v76ea Elitebook X360 1020 G2-1em59ea Elitebook X360 1020 G2(3cw34pa) Elitebook X360 1020 G2(2ub79ea) Elitebook X360 1020 G2(3cw31pa) E litebook X360 1020 G2-1em62ea Elitebook X360 1020 G2-1en09ea Elitebook X360 1020 G2-1en20ea Elitebook X360 1020 G2-1eq16ea Elitebook X360 1020 G2-1em56ea Elitebook X360 1020 G2(2tl72ea) Elitebook X360 1020 G2-1ep68ea Elitebook X360 1020 G2-2yp80pa Elitebook X360 1020 G2-1eq21ea Elitebook X360 1020 G2-1ep67ea Elitebook X360 1020 G2-1eq18ea Elitebook X360 1020 G2-1eq26ea Elitebook X360 1020 G2-2yg35pa Elitebook X360 1020 G2(2tl73ea) Elitebook X360 1020 G2-2yg23pa Elitebook X360 1020 G2-2yz14pa Elitebook X360 1020 G2-2yg36pa Elitebook X360 1020 G2-2zb59pa Elitebook X360 1020 G2(2un28aw) Elitebook X360 1020 G2-2xg51pa Elitebook X360 1020 G2-2yg22pa Elitebook X360 1020 G2-5sn36uc Elitebook X360 1020 G2-2un95ut Elitebook X360 1020 G2-2yb55pa Elitebook X360 1020 G2(2un24aw)

Replaces Part Numbers

ET04XL 915030-171 915030-1C1 915191-855 915191-955 ET04049XL HSTNN-IB7U

Technical Specifications

Voltage7.7V
Amp Hours6300mAh
Capacity6300mAh
Rate48.51Wh
Net Weight195.6g /6.90 oz
Gross Weight455.6g /16.07 oz
Approximate Weight455.6g /16.07 oz
Dimension 278.15 x 91.50 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

Why does HP Support Assistant show the wrong Wh rating after I installed the new battery?

The Wh figure displayed in HP Support Assistant is pulled from the cell's EEPROM, which stores the OEM-rated value at manufacture. The ET04XL replacement cell is rated at 48.51Wh, but if the EEPROM data does not match what the firmware expects, the reported figure can differ from the label. This is an EEPROM data mismatch, not a capacity fault. Run a full discharge-to-hibernate cycle then charge to 100% — on most G2 units this prompts the BIOS to re-read and display the correct value.

The new battery stopped charging at 80% and won't go higher — is the cell faulty?

No. The HP EliteBook X360 1020 G2 has a BIOS-controlled charge limit feature that caps charging at 80% when Battery Health Manager is active. This is a firmware setting, not a battery fault. Open HP Support Assistant or the BIOS setup (F10 at boot), navigate to Power settings, and switch Battery Health Manager from "Let HP manage my battery charging" to "Maximize my battery" — the cell will then charge to 100%.

My X360 1020 G2 shows 0% or "plugged in, not charging" for the first few minutes after fitting the replacement — what's happening?

The fuel gauge IC on the X360 1020 G2 needs at least one full charge cycle to lock onto the new cell's chemistry profile before it can report an accurate state of charge. On the very first boot with a new cell, the IC has no reference point, so it outputs 0% or holds the charge indicator in a waiting state. Leave the laptop plugged in and do not interrupt the first charge — once it reaches 100% and you run a full discharge, the gauge IC will initialise correctly and the reading will stabilise.

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