Welcome to our store. Your trusted source for batteries and power solutions. Learn more

For support or quotes: sales@batteryweb.com
WELCOME5
BatteryWeb

WP03XL HP EliteBook 845 G9 Replacement Battery 11.58V

Up to 19% off
New arrival
From $95.99 USD $118.99
Shipping calculated at checkout.
Fits HP EliteBook 845 G9 and replaces WP03XL, HSTNN-1B9Y, HSTNN-LB8V, HSTNN-LB8W battery pack.
11.58V, 4250mAh chemistry powers full workday operation on business notebooks.
Connector seats flush into EliteBook 845 G9 battery slot with positive-pin-first orientation.
We cycled this cell on bench against HP fuel gauge IC; BMS drew steady 90mA at rest, voltage held flat through discharge.
After install, run one full discharge to hibernation-cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears health warnings that appear after every cell swap.
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
WECARE5
Visa Mastercard American Express PayPal Apple Pay Google Pay Shop Pay Discover Klarna Afterpay Stripe
✦

Check that your old battery model number and device model to match our description. This makes sure they work together.

✦

We ship your order same day if you buy it before 4 PM EST.

Warranty

Let customers speak for us

from 11 reviews

Product is exactly as described and arrived quickly

Robert Jones
Rocket ES4-12 Compatible Replacement Battery

It took a bit longer than expected, likely due to the holiday season, but that was understandable. So far, the battery seems to be working well!

Linda M.
MGE UPS Systems Pulsar EX 1500RT Compatible Replacement Battery By Bright Way

Excellent substitute for the original, appearing to be the perfect replacement.

Alberto J.
APC SMART-UPS RT SURTA3000RMXL3U UPS High Performance Replacement Battery Set

It was what i was looking for. Support is fast

Jaswal
WAHEGURUG - RADHASWAMI

Fast service

Mark Casias
BatteryWeb

Perfect fit

Mark Casias
STX20L-BS Battery for Harley Softail FLS FLST 1991-2017 High Performance

Works Perfectly!!

Ben Benson
Invacare 220 Scooter High Performance Medical Replacement Battery Set

Send Your Battery Photo

Expert Technician Help

Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.

POST YOUR BATTERY IMAGE
Product & Solutions Expert

Product & Solutions Expert

✉ sales@batteryweb.com

🔹 10+ Years Battery Experience 🔹 Fast & Accurate Identification

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

11.58V

Amp

4250mAh

HP EliteBook 845 G9 — 11.58V Li-Polymer Replacement Battery (WP03XL)

This is an 11.58V, 4250mAh (49.22Wh) Li-Polymer battery replacing the WP03XL cell in HP EliteBook 845 G9 and related EliteBook 840 G9 and 1040 G9 business notebooks. It fits the multi-model EliteBook line sharing the WP03XL platform, including the 6F6R9EA and 5Z6N4EA variants. Voltage and connector match the original HP specification exactly.

  • EliteBook 840/845/1040 G9 platform fit: These models share the same battery bay geometry, connector pinout, and BMS handshake protocol. HP standardised the WP03XL cell across the G9 EliteBook line, so one cell covers the full chassis family without modification.
  • Bench tested on actual hardware: We ran this cell on an EliteBook 845 G9 and confirmed the BMS handshake completed correctly — BIOS recognised the battery, charge cycles initiated normally, and the protection circuit responded to charge cutoff at full capacity without fault codes.
  • BIOS learn cycle after installation: After fitting, run the laptop down to hibernate cutoff on battery alone, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle, clears the false "poor health" warning that appears after a cell swap, and gives the fuel gauge IC a clean baseline against the new cell's actual chemistry.

Why the EliteBook 845 G9 BIOS flags a new battery as poor health

The HP BIOS reads health data stored in the battery's EEPROM, not live cell voltage. When you swap cells, the EEPROM on the replacement doesn't match the charge history the BIOS was tracking on the old unit. The system interprets this mismatch as degradation. Running one full discharge-to-hibernate followed by an uninterrupted full charge lets the BIOS re-index against the new cell and clears the warning on most G9 units.

EliteBook shutting down at 20–30% charge remaining after battery swap

This is a voltage cliff symptom. Under combined CPU and display load, the cell voltage drops faster than the fuel gauge IC expects based on uncalibrated EEPROM data from the old battery. The BIOS triggers a protection shutdown before the displayed percentage reaches zero. Two to three full discharge and charge cycles recalibrate the fuel gauge IC to the new cell's actual discharge curve. After calibration, shutdown should not occur above 5–7% on normal workloads.

Compatible Models

EliteBook 845 G9 6F6R9EA Elitebook 840 G9 5Z6D3EA EliteBook 845 G9 5Z6N4EA EliteBook 1040 G9 4B928AV EliteBook 840 G9 5Z696EA Elitebook 1040 G9 5P6Q0EA EliteBook X360 830 G9 5P790EA ZBook Firefly 14 G9 6N2F6UT EliteBook 840 G10 EliteBook 830 G9 6K965PA EliteBook 830 G9 6K974PA EliteBook 830 G9 6F6Z1EA EliteBook 835 G9 6H746UT EliteBook 835 G9 5Z5D7EA EliteBook 845 G9 6H5D2UT EliteBook 845 G9 6X2Q6PA EliteBook 840 G9 6F6Z5EA EliteBook 845 G9 5Z5E9EA EliteBook 840 G9 6T220EA EliteBook 840 G9 6F6Q1EA EliteBook 1040 G9 6E5C8UT EliteBook X360 830 G9 6G9L5PA Zbook Firefly 14 G9 6N2G0UT EliteBook 830 G10 7Y3E4UT Elitebook 830 G9 6Y518PA EliteBook 840 G10 7Y359UT EliteBook 830 G9 6K975PA EliteBook 830 G9 6G9E9PA EliteBook 830 G9 6K581PA EliteBook 835 G9 6F6E9EA EliteBook 845 G9 6F6G4EA EliteBook 835 G9 6G9J6PA EliteBook 840 G9 6W7N9PA EliteBook 845 G9 6Q2U0PA EliteBook 865 G9 6F6H2EA EliteBook 845 G9 5P721EA Elitebook 840 G9 6G9G1PA EliteBook 845 G9 6F5S8EA Elitebook 1040 G9 72G58PA EliteBook 840 G9 5Z6D4EA EliteBook 1040 G9 6E5C5UT EliteBook X360 830 G9 6F6K2EA ZBook Firefly 14 G9 6W236UA EliteBook 840 G10 7Y389UT EliteBook 830 G9 6K961PA EliteBook 830 G9 6K981PA EliteBook 830 G9 6F6Y9EA EliteBook 835 G9 6H745UT EliteBook 835 G9 5Z5V2EA ZBook Firefly 14 G9-6B8A2EA EliteBook 845 G9 6X2R1PA EliteBook 840 G9 6W3C6PA EliteBook 865 G9 6G9S4PA EliteBook 845 G9 5Z5P1EA EliteBook 1040 G9 4B923AV EliteBook 840 G9 5P6X7EA EliteBook 1040 G9 6E5C6UT EliteBook X360 830 G9 6K976PA Zbook Firefly 14 G9 6Q426UT EliteBook 830 G10 7Y377UT EliteBook 830 G9 6C166UT EliteBook 840 G10 8B7U7UP EliteBook 830 G9 6K971PA EliteBook 830 G9 6F6T2EA EliteBook 835 G9 6G9J3PA EliteBook 835 G9 6F6F0EA EliteBook 845 G9 6G9U2PA EliteBook 835 G9 6G9K2PA EliteBook 840 G9 6C1Z3UT EliteBook 845 G9 6Y5Z8EC EliteBook 845 G9 6F679EA Elitebook 840 G9 6F6Z2EA EliteBook 845 G9 6G9U3PA EliteBook 1040 G9 6F686EA EliteBook X360 830 G9 ZBook Firefly 14 G9 6B878EA EliteBook x360 830 G9 6T141EA Zbook Firefly 14 G9 6N2F7UT EliteBook 840 G10 7Y365UT EliteBook 830 G9 6K963PA EliteBook 830 G9 6F6J7EA EliteBook 830 G9 6G9F7PA EliteBook 835 G9 6F6J0EA EliteBook 845 G9 6H5D4UT EliteBook 835 G9 6G9K0PA ZBook Firefly 14 G9 6B899EA EliteBook 845 G9 6V2W0PA EliteBook 840 G9 6W7P0PA EliteBook 865 G9 6G9K8PA EliteBook 845 G9 5Z6L9EA EliteBook 1040 G9 4B925AV EliteBook 840 G9 5P6X6EA EliteBook 1040 G9 6E5C7UT EliteBook X360 830 G9 6C160UT Zbook Firefly 14 G9 6V2U0PA EliteBook 830 G10 7Y3P2UT EliteBook 830 G9 6C1V0PA EliteBook 840 G10 84F30UP EliteBook 830 G9 6K973PA EliteBook 830 G9 5P795EA EliteBook 835 G9 6H5U5UT EliteBook 835 G9 5P6V3EA EliteBook 845 G9 6F6G5EA EliteBook 845 G9 6Q2T2PA EliteBook 840 G9 6Q160PA EliteBook 845 G9 6T1J3EA EliteBook 845 G9 6F6F3EA EliteBook 840 G9 6G9G5PA EliteBook 845 G9 6G9K4PA EliteBook 1040 G9 6G9L7PA EliteBook X360 830 G9 3F9X9PA ZBook Firefly 14 G9 6B8F0EA EliteBook x360 830 G9 5P7V7ES Zbook Firefly 14 G9 6V1T1PA EliteBook 840 G10 7Y361UT EliteBook 830 G9 6K966PA EliteBook 830 G9 6F6K0EA EliteBook 830 G9 6G9E8PA EliteBook 835 G9 6F6J1EA EliteBook 845 G9 5P722EA EliteBook 835 G9 6G9J4PA EliteBook 840 G9 6F6J5EA EliteBook 845 G9 7G027EC EliteBook 865 G9 6G9K6PA EliteBook 845 G9 6F6S0EA Elitebook 840 G9 6C182UT EliteBook 845 G9 6F6C3EA EliteBook 1040 G9 4B927AV EliteBook 840 G9 5Z6D5EA EliteBook 1040 G9 6F6N8EA EliteBook X360 830 G9 6C161UT ZBook Firefly 14 G9 6X1E1PA EliteBook 830 G10 7Y382UT EliteBook 830 G9 6K958PA ZBook Firefly 16 G9 EliteBook 830 G9 6K977PA EliteBook 830 G9 6F609EA EliteBook 835 G9 6T1L7EA EliteBook 835 G9 5P796EA EliteBook 845 G9 6F6H7EA EliteBook 845 G9 7A4W1PA EliteBook 840 G9 6G9G3PA EliteBook 845 G9 5Z5H5EA Elitebook 840 G9 5P755EA EliteBook 845 G9 6G9S1PA EliteBook 1040 G9 6G9M2PA EliteBook x360 830 G9 6K580PA Zbook Firefly 14 G9 6N2J9UT EliteBook 830 G10 7Y379UT Elitebook 830 G9 6Y519PA EliteBook 840 G10 7Y390UT EliteBook 830 G9 6K968PA EliteBook 830 G9 6Z2A8PA EliteBook 830 G9 6G9F2PA EliteBook 835 G9 5P726EA EliteBook 845 G9 6F6F5EA EliteBook 835 G9 6G9J5PA EliteBook 840 G9 5P6S0EA EliteBook 845 G9 6Q2U1PA EliteBook 865 G9 75V88PA EliteBook 845 G9 5P720EA Elitebook 840 G9 6W9U7PA EliteBook 845 G9 5Z5F2EA EliteBook 1040 G9 6F6Y5EA EliteBook 840 G9 5Z695EA Elitebook 1040 G9 6G9M4PA

Replaces Part Numbers

WP03XL HSTNN-1B9Y HSTNN-LB8V HSTNN-LB8W M64304-1D1 M64304-421 M64305-421 M73466-005 HSTNN-LB9Y

Technical Specifications

Voltage11.58V
Amp Hours4250mAh
Capacity4250mAh
Rate49.22Wh
Net Weight220g /7.76 oz
Gross Weight480g /16.93 oz
Approximate Weight480g /16.93 oz
Dimension 251.50 x 84.20 x 6.40mm

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

My EliteBook 845 G9 is showing the new battery as "0% available (plugged in, not charging)" — what's happening?

This is an EEPROM handshake issue, not a faulty cell. The HP BIOS reads authentication data from the battery's EEPROM on first contact, and if the learn cycle hasn't completed, charging can stall at 0% or refuse to start. Disconnect the AC adapter, let the laptop run on battery until it hibernates, reconnect power, and charge uninterrupted to 100%. That sequence forces the BIOS to re-initialise the charge controller against the new cell.

Windows Battery Report is showing the wrong Wh rating for this replacement — is the cell underspec?

The Wh figure in Windows Battery Report pulls from the EEPROM's rated design capacity field, which reflects the original cell's logged data, not a live measurement of the new cell. The actual chemistry in this replacement is rated at 49.22Wh as shipped. After two full calibration cycles, the reported full charge capacity in the battery report will converge closer to the real value. No hardware fault is present.

The fuel gauge is jumping from 60% to 15% with no warning after I replaced the battery — how do I fix it?

The fuel gauge IC in the EliteBook needs several charge and discharge cycles to map its algorithm to the new cell's discharge curve. Until that mapping is complete, voltage drops mid-use can cause the displayed percentage to skip. Run three complete discharge cycles — drain to hibernate, charge fully to 100% each time — without interrupting the charge. After the third cycle, the gauge IC recalibrates and the percentage readout stabilises to within a few percent of actual remaining charge.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Related Products

HP EliteBook 845 G9 6F6R9EA Replacement Battery, 11.58V, 4250mAh, Li-Polymer 1

Engineered for Performance. Built to Last.

Check out our top-rated selection of reliable products built to last. We offer high-quality options that deliver consistent performance for all your needs.

Our Collections