Swollen Laptop Batteries & Dirty Cooling Fans: Two Problems You Shouldn’t Ignore
By Twin Cities PC Repair | Bloomington, MN
Your laptop may look perfectly normal from the outside while something very different is happening inside.
During a recent laptop repair here at Twin Cities PC Repair in Bloomington, Minnesota, I opened a system and found two issues that are becoming increasingly common as laptops age: an extremely swollen lithium-ion battery and cooling fans packed with dust and debris.
The photos below are from the actual laptop. They provide a great example of why preventative laptop maintenance can be just as important as repairing something after it fails.
That Laptop Battery Isn't Supposed to Look Like That
Modern laptops commonly use lithium-ion or lithium-polymer batteries. As these batteries age or deteriorate, internal chemical changes can cause gases to build up inside the battery cells. Instead of remaining flat, the battery begins to expand or "puff."
That's exactly what you can see in our photo.
A swollen battery isn't simply a battery that doesn't hold a charge anymore. It's a safety issue and should be addressed promptly.
The U.S. Consumer Product Safety Commission has documented that lithium-ion batteries can overheat and present fire and burn hazards. It also warns against crushing, puncturing, or putting significant pressure on a battery because damage can lead to an internal short circuit and overheating. U.S. Consumer Product Safety Commission
You can learn more about lithium-ion battery and product safety directly from the U.S. Consumer Product Safety Commission.
Signs Your Laptop Battery May Be Swelling
You don't have to take your computer apart to notice some of the warning signs. Watch for a laptop case that no longer sits flat, a bottom cover beginning to separate, a touchpad that appears raised or becomes difficult to click, keyboard or palm-rest areas bulging upward, or unusual gaps developing between pieces of the laptop's case.
You may also notice dramatically reduced battery life or unusual heat.
If you suspect the battery is swollen, don't keep pressing the case back together, puncture the battery, or continue charging it to see what happens. Shut the computer down, unplug the charger, and have the battery professionally inspected.
A swollen battery can put tremendous pressure on the laptop's chassis and other components. Waiting too long can turn what might have been a battery replacement into a more expensive repair involving the touchpad, keyboard, case, or other internal components.
In this photo, you can clearly see how far the battery has expanded. This is not normal battery wear and should not be ignored.
Now Look at Those Cooling Fans!
The swollen battery wasn't the only thing that caught my attention in this laptop.
Take another look at the photos and you'll see just how much dust has accumulated around the cooling fans and internal components.
Your laptop's processor and graphics hardware generate heat whenever the computer is running. Heat pipes and heatsinks move that heat toward cooling fins, while one or more fans move air through those fins and out of the computer.
When dust, pet hair, and other debris accumulate inside the cooling system, airflow becomes restricted.
Lenovo's support guidance specifically recommends checking ventilation areas when a computer is running warm and clearing dust and debris from vents while the computer is powered off. Lenovo also notes that blocked airflow can contribute to overheating. Lenovo Support
What Happens When a Laptop Can't Breathe?
A dirty cooling system doesn't necessarily cause an immediate failure. Instead, you may gradually notice the laptop becoming hotter and louder.
The fans may run almost constantly. Performance can decrease as the processor reduces its speed to control temperature—a process commonly called thermal throttling. In more serious situations, the computer may freeze, unexpectedly shut down, or suffer premature component failure.
And there's another problem: cleaning only the outside vents isn't always enough.
Dust can collect inside the fan housing and against the heatsink fins, where you can't see it from outside the computer. That's why a proper internal cleaning can make such a significant difference on an older or heavily used laptop.
How Often Should a Laptop Be Cleaned?
There's no single schedule that works for every computer because the environment matters.
A laptop used every day in a home with pets, carpeting, smoking, construction dust, or other airborne debris can accumulate dust much faster than a lightly used computer in a clean office.
Lenovo suggests fan cleaning roughly every three to six months depending on the environment, although the appropriate interval will vary considerably from one computer to another. Lenovo
For most residential customers, I recommend paying attention to the computer rather than relying solely on the calendar. If the laptop has become noticeably hotter, the fan runs much more frequently than it used to, or the fan sounds unusually loud, it's worth having the cooling system inspected.
Preventative Maintenance Can Save You Money
This is one of those situations where a relatively simple inspection can potentially prevent a much larger problem.
At Twin Cities PC Repair, I work on Windows PCs and laptops for residential customers throughout Bloomington, Minnesota, and the surrounding Twin Cities area. Services include laptop diagnostics, hardware repair, battery replacement, cooling-system cleaning, data recovery, upgrades, and general computer maintenance.
You can learn more about my residential computer repair services at Twin Cities PC Repair.
If your laptop is running hot, making excessive fan noise, separating at the case, developing a raised touchpad, or simply hasn't been internally cleaned in years, don't wait until it stops working.
A little preventative maintenance today could help extend the life of the computer—and a swollen battery is something you definitely don't want to put off.
Twin Cities PC Repair
Bloomington, MN
Residential Sales & Support
(651) 456-8655
twincitiespcrepair.com