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HP ZBook Firefly 15 G8 CC03053XL Replacement Battery 11.55V 4600mAh

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From $68.99 USD $84.99
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Fits HP ZBook Firefly 15 G8 and EliteBook 850 G7/G8 models; replaces CC03053XL, HSTNN-DB9Q, HSTNN-IB9F.
11.55V and 4600mAh capacity sustains full CPU plus display load on this mobile workstation without mid-session shutdowns.
Connector seats into the slot with no locking tab; orientation is keyed to prevent reverse insertion on this chassis.
We bench-tested this cell in the ZBook Firefly 15 G8; the BMS accepted voltage negotiation on first power and held steady under sustained load.
After installation, run one full discharge to hibernation cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears false health warnings.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on 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.

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🔹 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.

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⚠️ 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

11.55V

Amp

4600mAh

HP ZBook Firefly 15 G8 / EliteBook 850 G7-G8 — 11.55V Li-Polymer Replacement Battery (CC03053XL)

This is an 11.55V, 4600mAh (53.13Wh) Li-Polymer replacement battery for the HP ZBook Firefly 15 G8 381M8Pa, ZBook Firefly 15 G7, EliteBook 850 G7, and EliteBook 850 G8 mobile workstations. It matches OEM part numbers CC03053XL, CC03XL, HSTNN-DB9Q, HSTNN-IB9F, and L77608 series references. Voltage, connector, and BMS handshake match what HP's EC firmware expects from this cell generation.

  • ZBook Firefly 15 G7/G8 and EliteBook 850 G7/G8 compatibility: These platforms share the same 11.55V three-cell Li-Polymer architecture, the CC03 connector pinout, and the same EC firmware battery-authentication sequence — which is why one cell SKU covers the entire lineup.
  • Bench tested on actual hardware: We ran this cell on a ZBook Firefly 15 G8 chassis. The EC recognised the pack without error codes, the BMS completed charge handshake normally, and the fuel gauge IC began tracking state-of-charge across the first two cycles.
  • First-cycle calibration after install: After fitting, run the laptop on battery until it hibernates at low-charge cutoff, then charge uninterrupted to 100% without using the machine. This gives the fuel gauge IC a full reference window against the new cell and clears the inaccurate health warning HP BIOS posts after every cell swap.

Why HP BIOS flags this replacement as "poor health" immediately after install

HP's EC reads EEPROM data written to the original cell over its service life — cycle count, wear state, and calibrated capacity. A new cell ships with blank or factory-default EEPROM values, so the BIOS compares those defaults against the old cell's last-written state and raises a health warning. This is not a fault with the new battery. One complete discharge-to-hibernate followed by a full uninterrupted charge resets the learn cycle and writes current EEPROM data from the new cell, which clears the warning on the next boot.

ZBook Firefly 15 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. The gauge reports 25% remaining while the cell voltage has already dropped below the EC's shutdown threshold under full CPU-plus-display load — so the system cuts power without warning. The fix is completing two to three full discharge-recharge cycles so the IC maps the new cell's voltage-to-capacity relationship accurately. After calibration, the shutdown threshold aligns correctly with what the gauge displays, and the cutoff moves to the expected range near 5%.

Compatible Models

ZBook Firefly 15 G8 381M8Pa ZBook Firefly 15 G7 21P37PA EliteBook 850 G7 Elitebook 850 G8 33Y74UT EliteBook 850 G7 10U49EA EliteBook 855 G7 204L6EA EliteBook 855 G7 23Y08EA ZBook Firefly 15 G8 42B37PA Elitebook 850 G8 2Y2S3EA EliteBook 850 G7 244A2PA EliteBook 850 G7 10U46EA EliteBook 855 G7 1Q6F0ES EliteBook 855 G8 43M22UT ZBook Firefly 15 G8 2C9S5EA ZBook Firefly 15 G7 1J3Q1EA EliteBook 855 G7 EliteBook 850 G8 3C7Z8EA EliteBook 850 G7 177F2EA EliteBook 855 G7 24Z98EA EliteBook 855 G7 277Q5PA ZBook Firefly 15 G7 1J3Q2EA ZBook Firefly 15 G7 Elitebook 850 G8 358P9EA EliteBook 850 G7 W10P64 EliteBook 850 G7 1W7S3PA EliteBook 855 G7 204H3EA EliteBook 855 G8 465R7PA ZBook Firefly 15 G8 38B50UT ZBook Firefly 15 G7 1Y5X9UT Elitebook 850 G8 1G1X2AV Elitebook 850 G8 2Y2Q5EA EliteBook 850 G7 229N4EA EliteBook 855 G7 204G5EA EliteBook 855 G8 48K06PA ZBook Firefly 15 G7 111G1EA ZBook FIREFLY 15.6 INCH G8 Mobile Workstation Elitebook 850 G8 2Y2Q3EA Elitebook 850 G7 1X7N7PA EliteBook 855 G7 23Y52EA EliteBook 855 G7 277Q6PA ZBook Firefly 15 G8 3L0L5PA ZBook Firefly 15 G8 313P1EA ZBook Firefly 15 G7 111F3EA Elitebook 850 G8 3G0P2PA EliteBook 850 G7 1J6H9EA EliteBook 850 G7 1D0E8UT EliteBook 855 G7 204H2EA EliteBook 855 G8 476W5US ZBook Firefly 15 G7 1Y9M7PA ZBook FIREFLY 15 G7 Mobile Workstation Elitebook 850 G8 2Y2R8EA EliteBook 850 G7 1J5U6EA EliteBook 855 G7 2D5K1PA EliteBook 855 G7 204G9EA ZBook Firefly 15 G8 38K65UT ZBook Firefly 15 G8 2C9R5EA Elitebook 850 G8 2Y2S9EA EliteBook 850 G7 18R49AW EliteBook 850 G7 229N6EA EliteBook 855 G7 23Y18EA EliteBook 855 G8 459H9EA ZBook Firefly 15 G8 38G42UT ZBook Firefly 15 G7 111D9EA EliteBook 855 G8 Elitebook 850 G8 3D4J8PA EliteBook 850 G7 1F6C7UT EliteBook 855 G7 1W9S1UT EliteBook 855 G7 204H4EA ZBook Firefly 15 G8 42B42PA Elitebook 850 G8 345C7UT EliteBook 850 G7 10U54EA EliteBook 850 G7 21U79PA EliteBook 855 G7 1J6M0EA EliteBook 855 G8 4A9D9PA ZBook Firefly 15 G8 3E9P1PA ZBook Firefly 15 G7 1Y3J1PA EliteBook 850 G8 EliteBook 850 G8 2Y2R5EA EliteBook 850 G7 177D5EA EliteBook 855 G7 24Z97EA EliteBook 855 G8 458X9EA ZBook Firefly 15 G7 1Y5X2UT ZBook Firefly 15 G8 2C9R7EA Elitebook 850 G8 2Y2Q1EA EliteBook 850 G7 1J6F3EA EliteBook 855 G7 1W9S5UT EliteBook 855 G7 229R7EA EliteBook 855 G8 3G22DEA ZBook Firefly 15 G8 2CR47EA ZBook Firefly 15 G7 111F1EA Elitebook 850 G8 384Q3PA Elitebook 850 G8 250A6EA EliteBook 850 G7 177F4EA EliteBook 855 G7 2Z6B5PA EliteBook 855 G8 43M23UT ZBook Firefly 15 G7 1N5P2PA ZBook FIREFLY 15.6 INCH G8 EliteBook 850 G8 358R8EA EliteBook 850 G7 320D8PA EliteBook 855 G7 1J6L9EA EliteBook 855 G7 277Q2PA ZBook Firefly 15 G8 2C9S6EA ZBook Firefly 15 G8 381M5PA ZBook Firefly 15 G7 111F2EA Elitebook 850 G8 3C7Z5EA EliteBook 850 G7 1C9H7UT EliteBook 850 G7 2E4W6UP EliteBook 855 G7 277R3PA EliteBook 855 G8 3L1F3AW

Replaces Part Numbers

CC03053XL CC03XL HSTNN-DB9Q HSTNN-IB9F HSTNN-LB8Q L77608-1C1 L77608-2C1 L77608-421 L78555-005

Technical Specifications

Voltage11.55V
Amp Hours4600mAh
Capacity4600mAh
Rate53.13Wh
Net Weight213g /7.51 oz
Gross Weight473g /16.68 oz
Approximate Weight473g /16.68 oz
Dimension 283.30 x 80.30 x 6.30mm

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

HP BIOS says the new battery is "unknown" or shows 0% health right after I installed it — is the cell faulty?

The cell is not faulty. HP's EC pulls health data from the EEPROM of whichever cell was last fitted, and a new pack ships with factory-default values that don't match the old cell's final state. Run the laptop on battery until it hibernates at low-charge cutoff, then charge it uninterrupted to 100%. That single learn cycle writes fresh EEPROM data from the new cell and clears the health warning on the next boot.

My ZBook Firefly 15 G8 is showing 71Wh in system info but this battery is rated 53.13Wh — why does Windows report the wrong number?

Windows reads the Wh design-capacity value stored in the cell's EEPROM. If the previous battery's EEPROM data is still cached — or the new cell's EEPROM hasn't been written yet — the OS displays whatever rated figure is in that register, not the actual measured chemistry of the new pack. Complete the first full discharge-to-hibernate then charge-to-100% cycle. After that, the fuel gauge IC writes the correct capacity to EEPROM and the value Windows reports will update to reflect the actual cell.

The charge on my EliteBook 850 G8 stops at 80% and won't go higher — is this a faulty replacement cell?

This is almost always HP's built-in Battery Health Manager, not a cell fault. HP BIOS ships with a charge-limit mode active on many G7 and G8 models that caps charging at 80% to reduce cell wear during AC-tethered use. Go to HP OMEN Gaming Hub or HP Support Assistant, find Battery Health Manager, and switch from "Maximize my battery health" to "Let HP manage my battery" or "Maximize my battery charge." The cap lifts immediately and the cell will charge to 100%.

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