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HP EliteBook 1050 G1 Replacement Battery ZG04XL 15.4V

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From $81.99 USD $100.99
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Fits HP EliteBook 1050 G1 laptops; replaces ZG04XL, HSTNN-IB8I, L07046-855, L07352-1C1.
15.4V at 4000mAh delivers 61.6Wh total energy for full workday unplugged operation.
Connector slides straight into the battery bay slot with a single locking tab catch.
We bench-tested this cell in an EliteBook 1050 G1 chassis; BMS accepted handshake on first insertion without firmware errors.
After installation, discharge fully to hibernate cutoff, then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears the false poor-health warning that appears after every cell swap on HP EliteBook platforms.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

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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

15.4V

Amp

4000mAh

HP EliteBook 1050 G1 — 15.4V Li-ion Replacement Battery (ZG04XL)

This is a 15.4V, 4000mAh (61.6Wh) Li-ion replacement battery for the HP EliteBook 1050 G1 notebook. It cross-references OEM part numbers ZG04XL, HSTNN-IB8I, L07046-855, and L07352-1C1. It fits the full EliteBook 1050 G1 range, including the 4QY20EA, 4PH83PC, and 4QY53EA variants.

  • EliteBook 1050 G1 platform fit: All EliteBook 1050 G1 variants share the same 15.4V four-cell architecture, connector pinout, and BMS handshake protocol. Swapping between SKUs within the 1050 G1 line does not change battery compatibility — the same cell works across the entire model family.
  • Bench tested on actual hardware: We ran this cell on an EliteBook 1050 G1 and confirmed the BMS handshake completed cleanly, BIOS accepted the battery without fault flags, and charge cycling stepped through all stages without interruption at the expected voltage thresholds.
  • Post-install calibration on the EliteBook 1050 G1: 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 this platform.

BIOS reporting poor battery health immediately after fitting a new cell

The EliteBook 1050 G1 stores battery health history in EEPROM on the old cell. When a new cell arrives, the BIOS reads no cycle history and flags the battery as degraded or unknown. This is not a fault with the replacement — it is a data mismatch between the new cell's EEPROM and the laptop's stored expectations. Run a full discharge-to-hibernate followed by an uninterrupted charge to 100% to allow the BIOS learn cycle to write fresh data to the new cell's EEPROM.

EliteBook 1050 G1 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 chemistry. The percentage reading is based on stale data from the previous cell, so the displayed figure and the real state-of-charge diverge under full CPU and display load. When voltage drops below the BMS cutoff threshold, the laptop shuts down even though the gauge still shows remaining charge. Complete two to three full discharge-and-charge cycles — the fuel gauge IC recalibrates progressively and the shutdowns stop once it tracks the new cell accurately.

Compatible Models

EliteBook 1050 G1 EliteBook 1050 G1 4QY20EA ELITEBOOK 1050 G1 4PH83PC EliteBook 1050 G1 4QY53EA ELITEBOOK 1050 G1 4PJ10PC ELITEBOOK 1050 G1 4PJ12PC EliteBook 1050 G1 3ZH18EA ELITEBOOK 1050 G1 4PJ11PC EliteBook 1050 G1 4QY19EA ELITEBOOK 1050 G1 5PL81PC EliteBook 1050 G1 4QY21EA ELITEBOOK 1050 G1 4PH82PC EliteBook 1050 G1 3ZH17EA ELITEBOOK 1050 G1 5PN06PC EliteBook 1050 G1 3ZH22EA ELITEBOOK 1050 G1 5AH70PC

Replaces Part Numbers

ZG04XL HSTNN-IB8I L07046-855 L07352-1C1

Technical Specifications

Voltage15.4V
Amp Hours4000mAh
Capacity4000mAh
Rate61.6Wh
Net Weight271.7g /9.58 oz
Gross Weight411.7g /14.52 oz
Approximate Weight411.7g /14.52 oz
Dimension 214.24 x 98.34 x 9.16mm

Product Highlights

  • Brand: HP
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

Why does my EliteBook 1050 G1 show "0% available (plugged in, charging)" right after I installed the new battery?

The fuel gauge IC on the 1050 G1 has lost its reference point — it is reading EEPROM data from the old cell and cannot place the new one on its charge curve yet. The battery is physically charging even though the display reads 0%. Let it charge uninterrupted to 100%, then discharge fully to hibernate-cutoff. After one complete cycle the gauge IC writes calibrated data and the percentage reads accurately.

The HP system information screen is showing the wrong Wh rating — it says something different from 61.6Wh. Is the battery faulty?

The Wh figure shown in HP system information pulls from the EEPROM on the cell, and there is sometimes a small difference between the EEPROM-rated value and the actual chemistry capacity. This is a data reporting difference, not a capacity fault — the cell still delivers its full 61.6Wh under load. If the discrepancy concerns you, run a full discharge to hibernate-cutoff and back to 100%; the BIOS learn cycle will update its logged Wh figure after that cycle completes.

My EliteBook 1050 G1 stops charging at 80% and never goes higher — is something wrong with the replacement cell?

This is almost always a BIOS-controlled charge limit, not a cell fault. HP's battery care settings in BIOS can cap charging at 80% to reduce cell wear during long periods plugged in. Go into BIOS setup (F10 at boot), navigate to Power, and check the Battery Health Manager or Adaptive Battery Optimizer setting — switch it from "Maximize my battery health" to "Let HP manage" or "Full charge." The battery will then charge to 100%.

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