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.
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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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4.4 ★★★★★
Based on 5 reviews
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Reading_with_Magic
Lake Worth, US
★★★★★ 5
Need book 2 please :-)
Format: Kindle
From the very first chapter, Metal Slinger hooked me and refused to let go. Set in a brutal, metal-bound world where power is carved from steel and survival depends on strength, strategy, and sheer will, this story follows a young woman forced into a dangerous system where control over metal isn’t just magic — it’s dominance, protection, and rebellion. When she’s pulled into escalating conflict and shifting alliances, she quickly learns that power always comes with a cost. The magic system is sharp and immersive without being overwhelming. The way metal manipulation is woven into combat and politics makes every confrontation feel cinematic and high-stakes. It’s gritty, tense, and beautifully layered. The Brynn, our FMC absolutely shines. She’s fierce but not untouchable, resilient without feeling unrealistic. Watching her navigate betrayal, survival, and the slow awakening of her own strength felt earned every step of the way. There’s grit in her fight scenes and vulnerability in her quieter moments that make her deeply human. And the tension? Immaculate. The chemistry simmers under the surface before sparking into something electric. Every reluctant alliance, every charged interaction, every moment of “are they about to destroy each other or kiss?” had me flying through pages. The pacing is relentless — no filler, no wasted scenes. Twists land hard. Stakes keep climbing. And that ending? Absolutely feral. The kind that leaves you staring at the wall for a minute before immediately checking when book two releases. ✨ Gritty metal-based magic ⚔️ High-stakes survival 🔥 Slow-burn tension 🖤 Fierce, layered heroine 💥 A finale that HITS (but cliffhanger!) This is one of those fantasies that reminds you why you fell in love with the genre in the first place. If this is just Book One, I am more than ready to be emotionally wrecked again in the sequel.
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Reviewed in the United States on February 14, 2026
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Amy Farrell
Birmingham, US
★★★★★ 5
Read this book! Then join our support group for the ending😜
While I’ve read some amazing books this year, it’s been awhile since I have completely devoured a book in less than 24 hours. This book was one I truly could not put down. I couldn’t fall asleep because I didn’t want to stop reading what happened next. The way this book starts is one of my absolute favorite ways to fall into a story - with no preamble and immediate conspiring amongst characters. Brynn has quickly become one of my new favorite FMCs. She is just so REAL. No whining or blaming her situation on everyone and everything else. She accepts her role in the world, but also holds a fierce determination to know the truth of that world. She is brave, yet terrified. Strong, yet self-conscious. She is cunning and intelligent and she doesn’t shy away from what is hard or allow emotion to overcome logic. I feel like she’s such a relatable character in everything that happens to her. Then we have Kai…our commander and son of the leader. He’s got secrets. Big ones. And the amount of times my feelings for him flipped in this book is insane. I’m still honestly reeling… Acker, my man…he’s mysterious, yet he doesn’t pull his punches. He’s loyal to a fault. He feels things deeply and he is fervent in his beliefs and desires. I adore him and yet want to shake him for the way he goes about making decisions and only sharing half truths. And right now my heart is aching for him and also terrified of him. When I say I need book 2 like I need water, that’s an understatement. I don’t have space to discuss every side character, but just know that I love them deeply and they each have big personalities of their own. The miscommunication honestly feels more like a necessity and less of a trope. The MCs don’t truly know one another, so of course there’s hesitancy to share everything with a stranger who has been somewhat forced upon you due to the situation you’ve both found yourself in. But it also is refreshing to watch them both learn to trust and communicate more and more as they go. The world building was exciting and unique - unlike anything I’ve read before. The kingdoms and their systems and the unique magics all create this setting that is utterly perfect. I never felt confused, but could easily envision everything as it was explained in detail. The slow burn and spice was paced so perfectly and realistically that it never felt weird or forced or annoying. It unfolds the way most normal relationships would (minus the magic and fantasy aspects). I truly cheered for our MCs and loved the way they finally came together. This story takes all the tropes we know and love and twists them into something unique and entirely different than all the other stories we’ve grown used to. And when I tell you that you will NEVER see the plot twists coming, HOLY SMOKES BATMAN! And the last 2 chapters took me ALL THE WAY OUT. I’m not sure how I’m supposed to be okay after that. I almost want to go back to chapter 55 and pretend the rest didn’t happen…but of course I can’t do that and now I’ll just be dying a little inside every day until I get my hands on book two! If you enjoy fantasy or romantasy, this has to be your next read. All the rest can wait. Grab your copy YESTERDAY.
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Reviewed in the United States on June 24, 2025
J
Verified Purchase
Jenniraereads
Whiting, US
★★★★★ 5
Outstanding book - A MUST READ
This is fantasy romance at its finest, and I couldn’t put it down from the moment I started. Packed with classic romantasy tropes that are done so well, especially my favorite: fated mates! The world-building is both easy to digest and detailed enough to feel immersive. It strikes the perfect balance—not too vague but never overwhelming. The world is divided between several groups of people, and the story revolves around the Alaha, who live on the water, and the Kenta, who reside on land. For centuries, these two factions have maintained a fragile peace, but things take a sharp turn when our FMC, Brynn, threatens that peace right at the beginning of the book. What follows is a thrilling dive into a world of magic, rebellion, and secrets. I will say no more, because you should go into this book relatively blind to get the full experience. Brynn, our FMC, is everything you could want in a lead. She’s smart, confident, and refuses to bow to threats. Then there’s the MMC, Acker. Scrumptious doesn’t even begin to cover it. The chemistry between him and Brynn is electric, and their dynamic had me grinning (and swooning) throughout. This book has all the best romantasy tropes: forced proximity, slowest of slow burns, elemental magic, fated mates (done right), political intrigue, and plot twists you will not see coming! Each trope is executed masterfully, blending seamlessly into the story without feeling overdone. If these are your jam, you’ll absolutely love this book. Even if they are not usually your cup of tea, this book may change your mind. While the pacing is fast and gripping overall, it does have a bit of a lull in the middle. That said, the ending more than made up for it—it left me gasping and desperate for the next book. I think I said aloud, “What the hell just happened?” when I finished the last page. This book grabbed me by the neck and didn’t let go. It’s full of banter, twisty turns, and a delicious tension. Probably one of my favorite fantasy reads this year. I am going to be thinking about this book non-stop until book 2 is released!
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Reviewed in the United States on November 30, 2024
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Nicole Gassman
Omaha, US
★★★★★ 4
Cool world building and great side characters
Format: Kindle
I adored the side characters and found them a lot more compelling than Jovie and Acker, if I’m being honest. I really wanted to like her but I found myself getting frustrated by her lack of, I don’t know, real rage for any of the crap people pull on her. Like ok I get this is romantasy but I have a hard time really believing you’re actually as upset at this guy as you claim to be when two minutes later you’re letting this dude shove his tongue down your throat. Additionally, an early running theme is that Jovie is frustrated that there are a bunch of people deciding things for her but the existence of the whole “matched/bond” thing makes much of her autonomy a moot point. Like at one point I think Acker even points out that them getting into bed together is a “foregone conclusion” and someone else mentions that the other matched pairs that don’t end up together ended up literally destroying each other. No pressure. I was a lot more interested in the characterization of Messer, Beau, and Hallis. I knew I was going to be exasperated consistently by this girl when she let Mr. Murder Hottie treat Messer like a war criminal after he almost got himself spatchcocked for them by a mighty-morphing radical with an attitude problem. If my homie went through the battle blender like that for me after I found out he had been secretly protecting me and keeping me company for weeks/months, I would be doing A LOT MORE than standing around trying to figure out if I actually thought he was my friend while Captain Boy Toy did some light torture on him. Also Acker, my dude, if you can still find it in your heart and your loins to get riled up while your sister is having a breakdown in the room over…I don’t know, seek help I guess. I liked the juxtaposition of Beau’s bravado and her militaristic delivery of information to her brother showing she can turn on a dime when needed. Adding the mental toll her gift takes on her throughout time and how she has self destructive coping mechanisms really gave her some cool depth, and I appreciated the vulnerability it lent her. Hallis was a weird character for me at first but I ended up looking forward to his dialogue a lot. Initially, I didn’t care for the way he seemed to immediately just be a real jerk to Jovie and it didn’t often read as playful to me when I think it sometimes meant to. Regardless, his genuine care for Beau and Acker and how he dropped the act immediately when they really needed him made him pretty endearing and I always appreciate a grump who cares. Honestly everything about this book was an A+ for me aside from the two main characters’ dynamic. When Jovie gets pissed at those bats and obliterates a forest? A+ When she tells Acker that she saw the signs that Messer was getting abused and acknowledged she felt shame and that she couldn’t fault him for being complicit in her mistreatment since she had done the same? A+ When she’s sitting there and coming to terms with the fact that everything she knows has been built on lies as she’s flipping through her sketchbook? A++ The writing and setting is great and the book is good, but someone needs to give Jovie a big stick and tell her it’s okay to be mad and smack people with it even if they’re hot.
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Reviewed in the United States on February 19, 2025
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Dimps
Lowell, US
★★★★★ 5
Mind blowing page turner
Oh my stars!!! 🤯 he falls first and he falls hard, enemies to lovers, fated mates. Every characters are lovable. There's action, magic, one horse 🤭 and a plot twist that keep on twisting. Oh and a bad ass FMC! Loved it!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 23, 2026

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