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Swollen batteries are the result of two things: energy density and heat. The swelling is the result of too much current coursing, in a noncontrolled fashion, inside a cell of the battery, which causes a build-up of heat and gas. This happens as the materials inside a battery decay or are subjected to stress or physical damage over time.
A given laptop battery is made up of several discrete cells, and issues can arise in just one, or more than one, of them. You'll often see laptop batteries described as, for example, four-cell or six-cell, indicating the internal structure of the battery. (Some laptops, usually business models, give you a choice of battery capacity/cell count at time of purchase, but that is less common than in the past.) The fact that laptops seldom come with removable batteries anymore (in the sense of, you can swap them in and out without opening up the chassis) exacerbates the problem.
Another common cause is mechanical damage to the battery. That might be caused by a blow to the laptop itself, or damage done when changing out it (or messing with other components around it). Striking a hard surface and denting the casing can cause a swelling condition, as can exposure to excessively high temperatures. Also, damage inflicted to the exterior of your device can transfer to the battery and cause it to overheat and swell.
Now, the signs may be subtle, or impossible to ignore. As the battery expands, your device might slowly change shape. For example, your laptop keyboard could start protruding, or you may notice your device is suddenly wobbly when you lay it on a flat surface, with the lower part of the chassis a bit distended if you look at it on edge. Or it might be something simply as mystifying as certain keyboard keys becoming hard to push.
If your laptop is easy to open (in other words, it has simple screws on the underside of the chassis), you can take off the bottom cover and, in many cases, check out the battery's physical state that way. If it looks puffy or rounded, that likely means it's swollen. Most important: When inspecting if your battery is swollen, proceed with caution, as the cells are under pressure. Wear eye protection and don't poke or pry at the cells.
A swollen battery isn't always immediately obvious when it happens, or at the onset. It depends on how much room it has to expand inside the laptop chassis. With thin laptops, that's usually little or none. The size of swelled battery can vary from a small bump to one large enough to turn your laptop into a seesaw, or even pop out the touchpad. (Yes, we've seen that.)
Once a battery starts bulging, it may well continue working, at lesser efficiency. Or your laptop may simply keep working when on the AC plug, but die quickly off-plug or power down as soon as the cord is pulled. Ultimately, don't ignore it; sooner or later, the battery will no longer work properly, and once swelling starts, it cannot be reversed. Your only solution is to replace the battery.
Battery accessibility in modern laptops (that is, the ability to get inside the case and replace the battery) is a very mixed bag. Most laptops are built differently from one another inside, in subtle variations, and some simply come with batteries that are non-replaceable because the chassis is designed not to be opened. With Apple's MacBooks, some ultrabooks running Windows (notably, some of Microsoft's Surface Laptop models), and some Chromebooks, batteries you just can't access to replace are sometimes a thing. So the first step is talking with your laptop's tech support to see what your options are. If your battery begins to swell, the time to act is now.
Assess whether you can even access the battery yourself. Contact the laptop manufacturer's support line or online resources for your product to ask about your options through "official" channels. Some popular models have have (unofficial) online tutorials that show the battery-replacement process, too.
Look into warranty coverage, and whether any still applies. (Unless you paid for an extended warranty, several years into ownership the answer is probably "no.") Note that if you are confident enough to try do a battery swap yourself, doing so may void the warranty, if any of it is left. Also, sometimes a laptop's battery is covered by a shorter warranty than the main laptop itself.
Be realistic about what you need to get the job done. If you want to make an attempt to fix it yourself, don't try and do it with just any old tools. You might need a special screwdriver or two (star-head screws are common on laptops), and sites like iFixit sell special tool kits(Opens in a new window) for Macs and other machines. A swollen battery can be the kiss of death for some laptops, depending on the product and manufacturer. "Batteries can have either a UL listing or a rating that determines whether they are customer-service- or client-technician-serviceable," says Thompson.
The only thing to do with your old, swollen battery is dispose of it. With lithium-ion batteries, you should proceed with caution, so as to not puncture the battery when handling it or removing it from your PC. Never pry at the battery with metal tools, or flex it in a swollen state. (A metal tool could pierce the outer skin and start a chemical reaction; we've done that by mistake in replacing old smartphone batteries and started some very small fires.) Swollen batteries also contain gases that you don't want to inhale.
Enjoy your devices and the performance offered by lithium-ion batteries and their new smart upgrades, but be aware that they should be treated with care and respect. If not, it may be more than just a battery that needs replacement.
Laptop is widely used for study and work. The battery is an indispensible hardware component in laptop. It powers up your laptop, making it possible for you to take the laptop out for work without connecting to the power supply. However, the battery will begin to wear down over time. This post offered by MiniTool tells you how to do Dell battery test in 3 ways.
Fortunately, there are plenty of notebooks that go the distance. Using our Laptop Mag Battery Test 2.0 (opens in new tab), which involves continuous Web surfing over Wi-Fi at 150 nits of brightness, we've identified the laptops with best battery life on the market.
We're talking more than 14 hours of endurance, which should more than suffice for that cross-country flight, a long day of meetings or multiple, back-to-back classes. These laptops can be anything, from premium consumer laptops to business laptops to even gaming laptops, yes, gaming laptops, like the Asus ROG Zephyrus G14, which achieved more battery life than the 16-inch MacBook Pro thanks to its AMD Ryzen CPU. Read our best of CES 2023 article to see the future of tech. See our recent Asus Zenbook 14 (Q409ZA) OLED review, which didn't make this list, but still has relatively long battery life.
The next chapter in Apple computing continues and the company's bet on custom silicon continues to hit the jackpot. M2 is 18% more powerful than its ancestor with an 8-core CPU. M2 is also bringing a new 10-core GPU that's 35% faster than the previous model. And if that isn't enough to get you excited, Apple has found a way to improve on the laptop's power efficiency, delivering over 18 hours of battery life. Read on to learn more about Apple's latest home run.
It's not easy to stand out in the crowded business laptop category. Competitors like the Lenovo ThinkPad X1 Carbon and HP's Elite Dragonfly have raised the bar, making it difficult for others to make their case. But Dell is proving that it's up to the task with the Latitude 9410 2-in-1, a sleek and sturdy business notebook with unmatched battery life.
But what makes the Latitude 9410 2-in-1 a true contender to the other best business laptops is its nearly 17 hours of battery life, which distracts from some minor pitfalls, like a high price and comparatively hefty weight.
The Asus ExpertBook B9450 wowed us with its battery life score. If you need a laptop with one of the best battery life scores of all time, the ExpertBook will keep you comfortable for an insane 16 hours and 42 minutes. You can literally get through two workdays without having to charge this beast.
Swapping the engine for 11th Gen Intel chips adds considerably faster performance, but the battery life upgrade is even more enticing; the Gen 6 model lasts for nearly 15 hours on a charge. These perks are packaged in a sleek aluminum chassis with a convenient 2-in-1 design and a handy stylus slot. It may not be as lightweight as the ThinkPad X1 Carbon or as alluring as the ThinkPad X1 Titanium Yoga, but the ThinkPad X1 Yoga Gen 6 could just be the best overall package of the trio.
I'll start by saying the new MacBook Air is an improvement over the previous model in every way, bringing monumental performance and battery life enhancements. Those bold claims Apple made about the M1? They weren't exaggerations. This MacBook Air out-muscles every laptop in its class while lasting a full day on a charge. And it does so with a fanless design, meaning the Air is pin-drop silent.
We also run heat tests by playing a 15-minute full-screen video and measuring temperatures in different areas of the laptop. Last but not least, our battery test consists of continuous web surfing over Wi-Fi at 150 nits of brightness. For MacBooks and premium Windows 10 laptops, a runtime of over 9 hours is considered a good result whereas gaming laptops and workstations that can stay powered for longer than 5 hours deserve praise. 041b061a72