SKU: 1033515812

HP CM03XL Original Battery – Fits EliteBook 840/850 G1

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Description

HP CM03XL Original Battery – Fits EliteBook 840/850 G1HP CM03XL Original Laptop Battery Compatible with HP EliteBook 840 G1 & 850 G1 Series Genuine HP Replacement Key Highlights Genuine HP Part: Original HP battery with exact specifications for your EliteBook Perfect Compatibility: Specifically designed for HP EliteBook 840 G1 and 850 G1 laptops Extended Runtime: 50Wh capacity provides up to 8 hours of productivity Safety Certified: Multiple protection circuits prevent overcharging and overheating

HP CM03XL Original Laptop Battery

Compatible with HP EliteBook 840 G1 & 850 G1 Series | Genuine HP Replacement

Key Highlights

Genuine HP Part: Original HP battery with exact specifications for your EliteBook
Perfect Compatibility: Specifically designed for HP EliteBook 840 G1 and 850 G1 laptops
Extended Runtime: 50Wh capacity provides up to 8 hours of productivity
Safety Certified: Multiple protection circuits prevent overcharging and overheating
Warranty Included: Comes with full manufacturer warranty for peace of mind

Product Overview

The HP CM03XL is an original equipment manufacturer (OEM) lithium-ion replacement battery specifically engineered for HP EliteBook 840 G1 and 850 G1 business laptops. This genuine HP battery delivers reliable performance with a 3-cell, 50-watt-hour (Wh) capacity design that restores your laptop to its original runtime specifications. Manufactured to meet HP's stringent quality standards, the CM03XL battery features advanced power management technology that communicates seamlessly with your laptop's BIOS for accurate charge level reporting and optimal power efficiency. Whether you're a business professional needing all-day productivity, a student moving between classes, or a remote worker requiring dependable mobile computing, this battery provides the authentic HP performance you expect. With built-in safety features including overcharge protection, temperature monitoring, and short-circuit prevention, you can trust this battery for safe, reliable operation throughout its lifecycle.

Detailed Specifications & Features

Compatibility & Applications

The HP CM03XL battery is designed as a direct replacement for the original battery in HP EliteBook 840 G1 and 850 G1 series laptops. These business-class laptops are known for their durability and performance, and the CM03XL battery restores them to their original power specifications. This battery is also compatible with some other HP laptop models that share the same chassis design and power requirements. Before purchasing, verify your laptop's exact model number and existing battery part number to ensure perfect compatibility. The CM03XL is ideal for business professionals, IT departments managing fleets of corporate laptops, educational institutions with HP laptop deployments, and individual users seeking genuine HP replacement parts for their devices.

Technical Specifications

This 3-cell lithium-ion battery operates at 10.8V (11.1V nominal) with a capacity of 50Wh (4500mAh). The battery uses high-density lithium-ion cells that provide optimal energy storage in a compact form factor. It features a standard 6-pin HP connector that ensures secure attachment and proper communication with the laptop's power management system. The battery includes an integrated circuit board with a microcontroller that monitors cell voltage, current, temperature, and charge cycles. This smart battery technology enables accurate runtime predictions and prevents damage from improper charging conditions. The physical dimensions are 20.5 x 6.8 x 2.0 cm (8.07 x 2.68 x 0.79 inches) with a weight of approximately 255 grams (0.56 lbs), maintaining the sleek profile of your EliteBook without adding unnecessary bulk.

Performance & Runtime

Under typical usage conditions (web browsing, document editing, and multimedia playback at medium brightness), the HP CM03XL provides between 6 to 8 hours of productive runtime. Actual battery life varies based on multiple factors including screen brightness, system load, wireless connectivity usage, and background applications. The battery supports HP's Fast Charge technology when used with compatible HP power adapters, allowing you to charge up to 90% in approximately 90 minutes. With proper care and maintenance, this battery is rated for up to 1000 full charge cycles while maintaining at least 70% of its original capacity. The intelligent power management system optimizes energy distribution based on your usage patterns, prioritizing power to critical components while conserving energy during light tasks.

Safety Features & Certifications

Safety is paramount in the design of the HP CM03XL battery. It incorporates multiple layers of protection including overcharge prevention, over-discharge protection, short-circuit safeguarding, and temperature monitoring. The battery management system (BMS) continuously monitors each individual cell to ensure balanced charging and prevent voltage irregularities. The battery enclosure is constructed from flame-retardant materials and includes pressure relief vents as an additional safety measure. This genuine HP battery complies with international safety standards including UL, CE, and RoHS certifications. Unlike aftermarket batteries that may cut corners on safety features, the CM03XL maintains all original safety protocols to protect both your laptop and your working environment.

Installation & Maintenance

Installing the HP CM03XL battery is a straightforward process that typically takes less than 5 minutes. Begin by shutting down your laptop and disconnecting the AC adapter. Turn the laptop over and slide the battery release latch to remove the existing battery. Align the new CM03XL battery with the compartment, ensuring the contacts are properly oriented, then gently press until it clicks into place. For optimal battery health, HP recommends calibrating the battery every 2-3 months by allowing it to discharge to approximately 10% capacity, then charging it uninterrupted to 100%. Avoid exposing the battery to extreme temperatures (below 0°C or above 45°C) and store it at approximately 50% charge if not using for extended periods. These maintenance practices will help maximize the battery's lifespan and performance.

Genuine vs. Aftermarket Considerations

Choosing a genuine HP CM03XL battery over aftermarket alternatives offers several significant advantages. Original HP batteries are engineered to exact specifications with quality-tested components that ensure reliable performance and safety. They maintain seamless communication with your laptop's power management system, providing accurate battery level reporting and optimized charging patterns. Aftermarket batteries often use inferior cells that may swell, lose capacity quickly, or even damage your laptop's charging circuitry. Genuine HP batteries also come with manufacturer warranty coverage, while aftermarket options typically offer limited or no warranty protection. Investing in an authentic CM03XL battery protects your larger investment in your EliteBook laptop and ensures consistent performance that meets HP's quality standards.

Environmental Considerations

HP designs the CM03XL battery with environmental responsibility in mind. The lithium-ion cells are free of heavy metals like cadmium and mercury, reducing environmental impact. HP's battery recycling program encourages proper disposal at end of life, recovering valuable materials while preventing hazardous waste from entering landfills. The battery's energy-efficient design helps reduce overall power consumption during use, and its durable construction means fewer replacements over the laptop's lifetime compared to lower-quality alternatives. By choosing a genuine HP battery, you're supporting responsible manufacturing practices and circular economy initiatives that HP has committed to through its sustainable operations framework.

Warranty & Support

The HP CM03XL battery is backed by a standard HP limited warranty that covers defects in materials and workmanship. Warranty duration may vary by region but typically ranges from 6 to 12 months from date of purchase. Register your product on the HP support website to activate warranty coverage and access additional resources. HP provides comprehensive online support including installation guides, troubleshooting articles, and battery maintenance recommendations. In the unlikely event of a defect, HP's warranty service network offers efficient replacement options to minimize disruption to your workflow. This warranty protection adds significant value compared to uncertified aftermarket batteries that may fail prematurely without recourse.

Advantages Considerations
  • Genuine HP quality and reliability
  • Perfect compatibility with EliteBook 840/850 G1
  • Restores original laptop performance
  • Advanced safety protections and certifications
  • Accurate battery level reporting
  • Supports HP Fast Charge technology
  • Manufacturer warranty included
  • Optimized power efficiency
  • High-density lithium-ion cells
  • Easy installation with no tools required
  • Higher cost than aftermarket alternatives
  • Specific to EliteBook 840/850 G1 (check compatibility)
  • 3-cell design may have less capacity than some extended batteries
  • Like all batteries, capacity decreases over time
  • Requires proper disposal/recycling at end of life
  • Performance varies based on usage patterns and settings

Restore Your EliteBook's Original Performance

Don't settle for reduced productivity due to a failing battery. The genuine HP CM03XL restores your EliteBook to its designed performance with guaranteed compatibility and safety.

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In stock • Free shipping on orders over $50 • 30-day return policy

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 1033515812

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carolyn
Pawtucket, US
★★★★★ 5
Sensitive skin
Such a good product. I use after micro needling when skin is sensitive. Also a great product to use as a barrier serum when starting tretinoin cream.
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Reviewed in the United States on April 24, 2026
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Lindsay
New York, US
★★★★★ 5
Saved my skin during an eczema flare up
This saved my skin! I had an eczema flare on my face, and my usual products weren’t working. A friend recommended the Avene brand and within 3 days of using this rescue barrier serum, my flare was almost completely gone! This saved my face!
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Reviewed in the United States on April 11, 2026
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B Helton
Lexington, US
★★★★★ 1
PLEASE REVIEW — FORMULA CHANGED!!!
I wish I would’ve posted a review PRIOR to the formula changing but just know that I LOVED this serum. I’ve struggled with hormonal acne (PCOS) and eczema for as long as I can remember. Finally, last summer my dermatologist put me on (3) different RX including Spironolactone and Accutane. I was so tired so I stopped everything except for CeraVe cleanser, retinol (Tretinoin) and CeraVe healing ointment. My made up skin routine was working until I used too much Tretinoin and burned my face. I had read great reviews about this product so I thought, I might as well try it — and IT WORKED! I’ve been using this product for almost a year and I loved it. However, 3 weeks ago when I ordered it, I noticed the bottle had a green tint. I could tell after one use that the feel of the serum was different, more watery, not as thick as it used to be. The smell was also different. Still, I kept using it for nearly 2 weeks and I experienced 2 breakouts! Sure enough, I stopped the product and within a few days, my skin was back to normal. I am very upset because as someone who has extremely sensitive skin, this worked but unfortunately, the new formula isn’t for me.
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Reviewed in the United States on May 14, 2026
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sandraday
Port Orchard, US
★★★★★ 5
Not greasy and no fragrance
Style: Updated Formula
Excellent moisturizer for my sensitive skin.
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Reviewed in the United States on May 26, 2026
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Alice Cooper
Lexington, US
★★★★★ 5
Great lotion for very dry skin
Style: Updated Formula
I had a laser done on my face and the products they gave me weren't working. This came highly recommended so I gave it a try. I'm very glad I did! It moisturized my face really well without appearing greasy. I used the rest when my face got dry from winter (in th midwest). Felt very rich and smooth. Medium thickness.
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Reviewed in the United States on December 19, 2025

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