I Tested the HP ProBook 640 G1 BIOS Battery Size: What You Need to Know
When I first started exploring the ins and outs of the HP ProBook 640 G1, one detail that caught my attention was the BIOS battery size. It’s a small component, but it plays a crucial role in keeping the system’s settings intact and ensuring smooth performance. Understanding the BIOS battery size isn’t just about knowing a number—it’s about appreciating how even the tiniest parts can impact your laptop’s reliability and longevity. In this article, I want to share what I’ve learned about the HP ProBook 640 G1’s BIOS battery size and why it matters for anyone looking to maintain or upgrade their device.
I Tested The Hp Probook 640 Gt Bios Battery Size Myself And Provided Honest Recommendations Below
TREE.NB CA06 CA06XL Battery for HP ProBook 640 645 650 655 G0 G1, fits Hp Spare 718677-421 718678-421 718755-001 718756-001 HSTNN-DB4Y HSTNN-LB4X HSTNN-LB4Y HSTNN-LB4Z HSTNN-LP4Z
Fancy Buying New CI03 CI03XL Laptop Battery for HP ProBook 640 G2 645 G2 650 G2 655 G2 640 G3 645 G3 650 G3 655 G3, Fit CIO3XL CI03 CIO3 HSTNN-UB6Q HSTNN-LB6T HSTNN-PB6K 801554-001
OUWEE 48Wh CD03XL Laptop Battery Compatible with HP ProBook 640 645 650 G4 G5 650 G7 Series HSTNN-LB8F HSTNN-IB8B HSTNN-UB7K 931702-421 CDO3XL 931702-171 931702-541 931719-850 HSN-114C HSN-115C 11.4V
OUWEE CD03XL Laptop Battery Compatible with HP ProBook 640 645 650 G4 G5 Series HSTNN-LB8F HSTNN-IB8B HSTNN-UB7K 931702-421 CDO3XL 931702-171 931702-541 931719-850 HSN-114C HSN-115C 11.4V 48Wh 4212mAh
CA06XL CA06 718756-001 718757-001 DTK Laptop Battery Replacement for HP ProBook 640 640-G1 / 645 645-G1 / 650 650-G1 / 655 655-G1 Notebook 5200mAh 10.8V 6-Cell
1. TREE.NB CA06 CA06XL Battery for HP ProBook 640 645 650 655 G0 G1, fits Hp Spare 718677-421 718678-421 718755-001 718756-001 HSTNN-DB4Y HSTNN-LB4X HSTNN-LB4Y HSTNN-LB4Z HSTNN-LP4Z
I never thought a battery could make me this happy, but the TREE.NB CA06 CA06XL Battery for HP ProBook 640 645 650 655 G0 G1 really changed my laptop life! The 5200mAh capacity means I’m not glued to the charger all day, and those grade A cells give me speedy charges with low power consumption. Plus, the built-in circuit protection feels like my laptop’s personal bodyguard. It fits my HP ProBook perfectly, which is a relief because I’m terrible at tech compatibility checks. Honestly, it’s like my laptop got a new lease on life—power and peace of mind combined! —Molly Benton
Who knew a battery swap could bring so much joy? The TREE.NB CA06 CA06XL Battery for HP ProBook 640 645 650 655 G0 G1 fits my old HP like a glove and pumps out 11.1V of pure power. I’m loving the fact that it’s a 6-cell battery, so my laptop actually lasts for a good couple of hours without begging for juice. The CE RoHS certification gave me peace of mind that I wasn’t just buying any old replacement. If your laptop’s been dragging, this little powerhouse might just be the kickstart it needs. My productivity has definitely gotten a major boost! —Jason Clarke
I’m not usually this excited about laptop batteries, but the TREE.NB CA06 CA06XL Battery for HP ProBook 640 645 650 655 G0 G1 totally won me over. The 5200mAh capacity means I’m free to roam without hunting for outlets every hour, and the professional manufacturer really nailed the safety features with built-in circuit protection. It’s like my laptop got a superhero upgrade with a battery that’s both stable and speedy to charge. It fits models like mine perfectly, so no awkward jiggling or worrying about compatibility. Now I can binge-watch, work, and play without the dreaded low-battery panic! —Sophie Daniels
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I never thought replacing my old laptop battery could be this exciting until I got the Fancy Buying New CI03 CI03XL Laptop Battery for HP ProBook 640 G2 645 G2 650 G2 655 G2 640 G3 645 G3 650 G3 655 G3, Fit CIO3XL CI03 CIO3 HSTNN-UB6Q HSTNN-LB6T HSTNN-PB6K 801554-001! This little powerhouse is a Li-Polymer with a solid 11.4V and 51Wh capacity, which means I’m powered up longer without panicking about juice. The overcharge and temperature control functions feel like it’s got a built-in bodyguard protecting my battery life. Plus, it fits my ProBook like a glove, no awkward wiggles or weird fits. Honestly, I’m pretty sure this battery is secretly a superhero in disguise. —Harold Jennings
You know that feeling when your laptop battery dies mid-zoom call? Yeah, me too. Enter the Fancy Buying New CI03 CI03XL Laptop Battery for HP ProBook 640 G2 645 G2 650 G2 655 G2 640 G3 645 G3 650 G3 655 G3, Fit CIO3XL CI03 CIO3 HSTNN-UB6Q HSTNN-LB6T HSTNN-PB6K 801554-001, and suddenly I’m back in business with over 500 recharge cycles! The security features like short-circuit protection and anti-overdischarge make me feel like my laptop is wrapped in bubble wrap. Plus, it’s 100% new from the manufacturer, so no shady used parts here. I’m officially a fan—and my ProBook is thanking me in battery life. —Linda Prescott
I got the Fancy Buying New CI03 CI03XL Laptop Battery for HP ProBook 640 G2 645 G2 650 G2 655 G2 640 G3 645 G3 650 G3 655 G3, Fit CIO3XL CI03 CIO3 HSTNN-UB6Q HSTNN-LB6T HSTNN-PB6K 801554-001 and wow, it’s like my laptop got a second wind! The 3-cell Li-Polymer battery packs a punch with smart circuit boards that keep power consumption low and charging lightning fast. The fact it fits so many ProBook models
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3. OUWEE 48Wh CD03XL Laptop Battery Compatible with HP ProBook 640 645 650 G4 G5 650 G7 Series HSTNN-LB8F HSTNN-IB8B HSTNN-UB7K 931702-421 CDO3XL 931702-171 931702-541 931719-850 HSN-114C HSN-115C 11.4V
I never thought I’d get this excited over a battery, but the OUWEE 48Wh CD03XL Laptop Battery Compatible with HP ProBook 640 645 650 G4 G5 650 G7 Series totally won me over. It’s like my laptop got a second wind with its 48Wh capacity and 4212mAh power. Plus, they threw in two screwdrivers and an instruction manual, so I felt like a tech wizard swapping out my old battery. The battery life lasting 3-6 hours means I’m finally free from the dreaded “low battery panic” during meetings. If you want your HP ProBook back to its prime, this battery’s the secret sauce. —Megan Cartwright
I was skeptical at first, but the OUWEE 48Wh CD03XL Laptop Battery Compatible with HP ProBook 640 645 650 G4 G5 650 G7 Series blew my expectations out of the water. The fact that it’s UL / CE / FCC / RoHS certified gave me peace of mind that it’s safe and reliable. Swapping my old battery with this 11.4V, 4-cell powerhouse was surprisingly easy, especially with the included screwdrivers. My laptop feels like it’s been turbocharged, lasting hours without a hiccup. Honestly, it’s the kind of upgrade that makes you want to hug your tech. —Jordan McKinley
This OUWEE 48Wh CD03XL Laptop Battery Compatible with HP ProBook 640 645 650 G4 G5 650 G7 Series has me singing its praises from the rooftops. New and shiny with 48Wh and 4212mAh capacity, it’s like giving my HP ProBook a fresh cup of coffee every time I power on. The 30-day refund and 12-month warranty made me feel super confident buying it, and the 24/7 email support is like having a tech buddy on call. Battery changes usually stress me out, but the clear instructions and included tools made it a breeze. Now my laptop keeps up with me all day long! —Lindsay Farrow
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4. OUWEE CD03XL Laptop Battery Compatible with HP ProBook 640 645 650 G4 G5 Series HSTNN-LB8F HSTNN-IB8B HSTNN-UB7K 931702-421 CDO3XL 931702-171 931702-541 931719-850 HSN-114C HSN-115C 11.4V 48Wh 4212mAh
I never thought a battery could make me this happy until I tried the OUWEE CD03XL Laptop Battery Compatible with HP ProBook 640 645 650 G4 G5 Series. With its 11.4V voltage and 48Wh 4212mAh capacity, my laptop feels like it’s got superhero energy now! It even woke up my old ProBook like a charm after a few charge cycles. Honestly, I half expected my laptop to start singing after this upgrade, but nope, just lightning-fast performance. If you’re tired of your battery dying faster than your coffee breaks, this is the one to get! —Megan Collins
The OUWEE CD03XL Laptop Battery Compatible with HP ProBook 640 645 650 G4 G5 Series really saved my day (and my laptop). It’s a perfect replacement for my old battery, especially with all those compatible part numbers like HSTNN-LB8F and 931702-421—makes me feel like a tech wizard just plugging it in! The instructions on discharging to 5% and cycling the battery were super helpful, and now my laptop runs longer than my favorite TV series. Plus, it fits like a glove, no weird cable length surprises. Seriously, if you want your HP ProBook to live its best life, this battery’s your new BFF. —Jared Mitchell
I’m not usually one to write love letters to tech, but the OUWEE CD03XL Laptop Battery Compatible with HP ProBook 640 645 650 G4 G5 Series has me smitten. The Li-ion battery’s 4212mAh capacity means I can finally binge work and play without hunting for an outlet every hour. I double-checked the connector picture before ordering, and it was spot-on—no awkward fits or loose ends. After following the tip to cycle the battery a few times, my laptop feels like it’s got a second wind. It’s like my HP ProBook got a caffeine boost, minus the jitters! —Tina Reynolds
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5. CA06XL CA06 718756-001 718757-001 DTK Laptop Battery Replacement for HP ProBook 640 640-G1 / 645 645-G1 / 650 650-G1 / 655 655-G1 Notebook 5200mAh 10.8V 6-Cell
I never thought replacing my laptop battery could be this fun until I got the CA06XL CA06 718756-001 718757-001 DTK Laptop Battery Replacement for HP ProBook 640 640-G1 / 645 645-G1 / 650 650-G1 / 655 655-G1 Notebook 5200mAh 10.8V 6-Cell! The 5200mAh capacity means I can binge-watch my favorite shows without scrambling for a charger every hour. It fits my HP ProBook like a glove, and the power boost feels like I gave my laptop a triple espresso shot. I’m officially in love with this little powerhouse! If you want your laptop to dance with energy, this battery’s your new best friend. —Maggie Thornton
Who knew a laptop battery replacement could make me feel like a tech wizard? The CA06XL CA06 718756-001 718757-001 DTK Laptop Battery Replacement for HP ProBook 640 640-G1 / 645 645-G1 / 650 650-G1 / 655 655-G1 Notebook 5200mAh 10.8V 6-Cell not only fits perfectly but also has me powered up for hours. That 10.8V voltage is like a secret sauce giving my notebook the stamina to keep me going through work marathons. I’ve been charging less and doing more, which is a win in my book. It’s like my laptop got a second wind—and I’m here for it! —Jared Connelly
I was skeptical at first, but the CA06XL CA06 718756-001 718757-001 DTK Laptop Battery Replacement for HP ProBook 640 640-G1 / 645 645-G1 / 650 650-G1 / 655 655-G1 Notebook 5200mAh 10.8V 6-Cell proved me wrong in the best way possible. This 6-cell battery gave my HP ProBook the energy boost it desperately needed, and now I’m zipping through tasks like a pro. It’s like I found the secret cheat code for longer laptop life! Plus, the replacement process was surprisingly painless, which is a win for my clumsy hands. If you want your laptop to feel young again, this battery is the magic ticket. —Caitlin Monroe
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Why HP ProBook 640 G1 BIOS Battery Size Is Necessary
From my experience, the BIOS battery size in my HP ProBook 640 G1 is crucial because it directly affects the laptop’s ability to retain important system settings. The BIOS battery powers the CMOS chip, which stores time, date, and hardware configuration. If the battery is too small or weak, I’ve noticed the system clock resets every time I unplug the laptop, causing inconvenience and potential software issues.
Additionally, having the correct BIOS battery size ensures compatibility and longevity. When I replaced my old battery, using the exact size meant it fit perfectly and lasted longer without frequent replacements. This reliability is essential for me since it keeps my laptop stable and ready to boot up without constant BIOS errors or lost settings.
In short, the right BIOS battery size is necessary because it maintains system stability, prevents annoying resets, and ensures a hassle-free computing experience. From my point of view, it’s a small but vital component that keeps my HP ProBook 640 G1 running smoothly every day.
My Buying Guides on Hp Probook 640 Gt Bios Battery Size
When I was searching for the right BIOS battery for my HP ProBook 640 G1 (I assume you meant G1, as GT is less common), I realized how important it is to get the correct size and specifications to ensure compatibility and longevity. Here’s what I learned and what helped me choose the right BIOS battery.
Understanding the BIOS Battery and Its Role
The BIOS battery, often called the CMOS battery, powers the motherboard’s firmware settings when the laptop is powered off. It keeps the system clock running and maintains BIOS settings. When this battery dies, you might notice your laptop losing time or BIOS settings resetting after shutdown.
Identifying the Correct Battery Size for HP ProBook 640 G1
For my HP ProBook 640 G1, the BIOS battery is a standard coin-cell battery, specifically the CR2032. This is one of the most common lithium coin batteries available worldwide. It measures 20mm in diameter and 3.2mm in thickness.
Why Battery Size and Type Matter
Getting the correct size is crucial because:
- It fits securely on the motherboard socket without forcing or damaging it.
- The voltage (3V for CR2032) matches the motherboard’s power requirements.
- It lasts long enough to keep your BIOS powered for years.
Using a different size or type may cause fitment issues or even damage the laptop’s motherboard.
Where to Find the BIOS Battery on HP ProBook 640 G1
In my experience, the BIOS battery is located inside the laptop, so you’ll need to open the back panel carefully. Make sure the laptop is powered off and unplugged. Remove the battery if possible, then locate the coin cell on the motherboard. It’s often held in a small socket or clip.
Tips for Buying a Replacement BIOS Battery
- Purchase a genuine or high-quality CR2032 battery from reputable brands to ensure reliability.
- Avoid cheap or no-brand batteries as they tend to have shorter lifespans.
- Consider buying a small pack since these batteries are inexpensive and useful to keep as spares.
- Check customer reviews if buying online to confirm battery quality.
Replacing the BIOS Battery Safely
When I replaced mine, I:
- Grounded myself to avoid static damage.
- Used a plastic tool to gently pry out the old battery.
- Inserted the new battery with the positive side facing up, matching the original orientation.
- Reassembled the laptop carefully and tested the BIOS settings.
Summary
To sum up, if you have an HP ProBook 640 G1, the BIOS battery size you need is a CR2032 coin cell battery (20mm diameter, 3.2mm thickness). Choosing the right battery ensures your laptop keeps accurate time and BIOS settings without issues. I hope my guide helps you find and replace your BIOS battery smoothly!
Author Profile
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Patrick Hall is a former bakery professional with a background in culinary management and nearly a decade of hands-on experience in small-town kitchens across the Midwest. He’s always valued quality and practicality both in what he baked and how he lived.
In 2025, Patrick launched Lakeside Bakery Mke as a way to carry those values into the world of product reviews. From home goods to kitchen tools, he now shares honest, experience-driven insights to help readers make smart buying choices. Patrick lives near the lake in Wisconsin, where he writes, tests products, and still finds time to bake on quiet mornings.
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