
Worn, Swollen, or Failing Laptop Batteries, Mac and PC
If your laptop battery dies in thirty minutes when it used to last six hours, won\'t hold a charge, won\'t charge at all, has visibly swollen and is pushing the trackpad up, or has triggered a "service battery" warning, we can help. We\'re a drop-off computer repair shop in Amherst, NY, and laptop battery replacement is one of the most common things we handle. Bring the laptop in, we identify the right battery for your model, we install it, we calibrate it on the new install, and we hand the laptop back working. The rest of the machine doesn\'t change.
Battery replacement is one of those repairs that\'s easy to put off and shouldn\'t be. A worn battery means tethering yourself to an outlet, losing the portability that\'s the whole point of a laptop. A swollen battery is a real fire hazard that gets worse over time. A non-charging laptop is one bumped power cord away from data loss. And the cost of replacing a battery is dramatically less than the cost of a new laptop, especially on machines that are otherwise working fine.
The honest first thing: not every "battery problem" turns out to be the battery. Sometimes the issue is the charging circuit on the motherboard. Sometimes it\'s the charger itself. Sometimes it\'s a software setting limiting charge intentionally for battery longevity. We diagnose first and tell you what\'s actually going on before quoting work.
This page covers battery replacement on both Mac and PC laptops. We have a Mac-specific battery replacement page covering MacBook Air, MacBook Pro, and the adhesive-based construction modern MacBooks use. A PC-specific page covers the wide range of Windows laptops we work on, from business laptops with removable batteries to ultrabooks with glued-in cells.
What\'s Actually Wrong With Your Battery
"My laptop battery is bad" can mean different things. Here\'s what we typically see:
- Capacity loss from normal aging. The most common. The battery still works but holds dramatically less charge than when it was new. A battery that originally lasted six hours now lasts ninety minutes. This is normal lithium-ion degradation; the fix is replacement.
- Swelling. The battery has physically expanded, pushing the trackpad up, separating the bottom case, or making the laptop wobble on a flat surface. This is a fire and chemical hazard. Stop using the laptop, don\'t close the lid hard, and bring it in soon.
- Won\'t charge. The laptop runs on AC fine but the battery doesn\'t accumulate charge. Could be a worn-out battery, a bad charging circuit, a damaged charging port, or a faulty charger. Diagnostic narrows it down.
- Charges intermittently. Charging works sometimes, doesn\'t work other times, sometimes only in specific positions. Often a damaged charging port or a bad cable, but can also indicate battery or charging-circuit issues.
- "Service battery" warning. The OS has detected the battery has degraded past the threshold for normal operation. macOS shows this in the battery menu and System Information. Windows shows it through battery reports.
- Random shutdowns under load. The laptop powers off when the battery is asked to deliver more current than it can sustain. Often happens when running CPU-intensive tasks on a worn battery. The battery has lost not just capacity but the ability to deliver peak power.
- Won\'t turn on at all without AC. The battery has fully failed and the laptop can\'t boot from it. Functionally a desktop until replaced.
- Battery percentage jumps erratically. Showing 80% then suddenly 30%, or staying at 100% for hours then dropping rapidly. Battery cell imbalance or calibration issues, often a sign of an aging battery.
- Battery health below 80%. Apple\'s threshold for "service recommended." On Mac, check System Information > Power for cycle count and condition. On Windows, generate a battery report with powercfg /batteryreport.
- Charging circuit damage. Less common. The battery itself is fine but the motherboard\'s charging circuitry has a problem. Symptom: a new battery installed doesn\'t fix the issue. We test for this before recommending battery replacement.
What\'s Included in a Battery Replacement Job
- Free diagnostic. We pull battery health reports from the OS, check the charging circuit, verify the charger is working correctly, and confirm the battery itself is the actual problem.
- Sourcing the right battery. Different laptop models accept different battery part numbers, sometimes with multiple variants for the same model (different cell counts, different capacities). We identify the correct part for your specific machine.
- Reputable suppliers. We use established battery suppliers with consistent quality. We don\'t use the bottom-tier batteries that fail quickly or, in some unfortunate cases, fail unsafely.
- Careful disassembly. Each laptop has its own procedure. Some have removable batteries with a simple latch. Most modern laptops require removing the bottom case. MacBooks specifically have adhesive-mounted batteries that need solvent and patience to remove cleanly.
- Safe handling. Lithium batteries are safe under normal conditions but can become hazardous if punctured, bent, or shorted. We handle them carefully and dispose of the old battery properly.
- Charging port and cable inspection. While we have the laptop apart, we check the charging port for wear and the internal cable for damage. If something is on its way out, we mention it.
- Battery calibration. The OS needs to learn the new battery\'s characteristics. We charge to full, confirm the OS reports correct capacity, and verify the discharge behavior is as expected.
- Charging behavior verification. We test charging across multiple cycles to confirm the new battery is accepting charge correctly and the OS is reporting accurate health.
- Old battery disposal. Old lithium batteries are recycled through proper hazardous-material channels, not thrown in regular trash.
- Real warranty. Manufacturer warranty on the new battery (typically six months to one year) plus our installation labor warranty.
Signs Your Battery Needs Replacement
- Battery life has dropped from hours to under thirty minutes for normal use
- The laptop dies the second you unplug it
- The laptop won\'t turn on without AC power
- The battery won\'t charge at all, or charges only intermittently
- Visible swelling: the bottom case is bulging, the trackpad is being pushed up, the laptop wobbles on a flat surface
- "Service battery" or "service recommended" warning from the OS
- Battery health below 80 percent of original capacity
- Random shutdowns when running CPU-intensive tasks even with battery showing 50%+
- Battery percentage jumps erratically (showing 80%, then 30%, then 70%)
- The laptop is hot to the touch around the battery area, especially under the keyboard or trackpad
- Battery cycle count above 1,000 (visible in macOS System Information; Windows requires a battery report)
- The laptop is several years old and the battery has never been replaced
How Our Battery Replacement Process Works
- Scheduled drop-off and intake.Call to schedule, bring the laptop in. We talk through what\'s been happening: how fast it dies, whether it charges, whether you\'ve noticed swelling, when it started getting worse.
- Free diagnostic.We pull battery health reports, check cycle count and capacity, verify the charging circuit is working, and rule out other causes (bad charger, software setting limiting charge, charging port damage).
- Quote and parts ordering.Identify the right battery for your model, quote the work, give you a real number with a real timeline.
- Parts arrival.Most laptop batteries arrive within one business day. Less common models occasionally take longer.
- Disassembly.Each laptop has its own procedure. Removable battery: latch and slide out. Internal screw-mounted battery: remove bottom case, unscrew battery, disconnect cable. MacBook adhesive battery: solvent application, careful removal, cleanup.
- Battery installation.New battery goes in. Adhesive-mounted batteries get fresh adhesive. Cable connects to the same connector with the right routing.
- Reassembly.Bottom case back on, screws back in, fresh adhesive replaced where applicable.
- Calibration and charging tests.Boot the laptop, charge to 100 percent, verify the OS reports correct capacity. Discharge under load to verify discharge behavior. Multiple cycles to confirm the OS is learning the new battery correctly.
- Old battery disposal.Properly recycled through hazardous-material channels.
- Pickup and walkthrough.You come pick up the laptop. We hand it back, walk through what we replaced, and answer any questions about getting the most life out of the new battery.
Mac vs PC Battery Replacement: What\'s Different
The general approach is similar (identify the right battery, source it, install it carefully) but several details differ.
On the PC side, batteries are often more accessible. Older business laptops have user-removable batteries with a simple latch; you can swap one in a minute. Modern PC laptops typically have internal batteries that come out after the bottom case is removed, but the batteries themselves are usually screwed in or held with a single connector, no adhesive. Replacement batteries for popular Windows laptop models are widely available and reasonably priced.
On the Mac side, especially modern Retina MacBooks and Apple Silicon models, Apple uses adhesive-mounted batteries. Multiple individual cells are bonded directly to the bottom case with strong adhesive. Safe removal requires solvent (typically isopropyl alcohol applied carefully through specific tabs Apple\'s designs include for service), patience, and care to avoid damaging components underneath. The job takes longer and the part is more expensive than a typical PC laptop battery.
For Mac-specific details and pricing, see our MacBook battery replacement page. For PC-specific details, see our PC laptop battery replacement page.
Common Battery Replacement Scenarios We See in Amherst
The 4-year-old laptop that suddenly only lasts an hour
Most common scenario. A laptop that was great when new, has been used daily for several years, and the battery has gradually worn out to the point where the customer can\'t leave the office without bringing the charger. Routine replacement, in and out within a couple days.
The swollen MacBook Pro
A 4-7 year old MacBook Pro with a battery that\'s started pushing the bottom case outward or the trackpad up. The customer noticed the laptop wobbles on a flat surface or the trackpad doesn\'t click properly anymore. Swollen Mac batteries are common at this age. We replace, the laptop sits flat again, the trackpad clicks normally.
The non-charging laptop
The laptop won\'t accept a charge from the wall. Could be the battery, the charger, the charging port, or the charging circuit. We diagnose. About half the time it\'s the battery, the other half it\'s the charging port or the charger itself.
The "service battery" warning
Mac with the menu bar showing "service battery" or Windows showing battery health warnings. The customer ignored it for months but it\'s gotten persistent. Health is below 80 percent. Replacement.
The student laptop after four years
A laptop bought for college freshman year, now well into year four or five. The battery has reached end of useful life right around when the student needs it for grad school applications. We replace, the laptop is good for several more years.
The MacBook Air with the trackpad that won\'t click
Often a swollen battery underneath the trackpad area. The trackpad gets pushed up by the swelling and stops clicking properly. Replacing the battery restores trackpad function.
The "I bought a replacement online but I\'m worried about installing it"
Customer ordered a battery online, then got nervous about doing the installation themselves, especially on a MacBook with adhesive. We\'ll install a customer-supplied battery (with the caveat that we can\'t warranty the part itself, only our labor). About half the time we mention the customer-bought part is from a low-quality source and recommend swapping for one we trust.
The aging desktop replacement laptop
A laptop that\'s been used as a desktop replacement, plugged in 24/7 for years. The battery shows odd patterns: holds 100 percent at all times because it\'s never discharged, but discharge behavior is erratic when finally unplugged. Heat from being plugged in constantly degrades batteries differently than cycling. Replacement.
Why Drop-Off Beats DIY Battery Replacement
Battery replacement looks doable on YouTube, and on user-removable-battery laptops it genuinely is. We\'re not going to pretend otherwise. The reasons customers prefer to bring it in:
The right-part problem. Buying a battery online without knowing the exact part number for your specific laptop variant is the single most common DIY mistake. Same model name doesn\'t mean same battery; manufacturers often have multiple battery variants with different physical dimensions, different cell counts, different capacities, all for "the same" laptop. The wrong battery either doesn\'t fit or doesn\'t work correctly with the OS.
The puncture risk. Lithium batteries can ignite if punctured. Common DIY mistakes: prying with a screwdriver against the battery case (can puncture), trying to lift a glued battery without softening the adhesive (can deform and damage), removing screws and pulling the battery up forcefully (can bend cells). All of these have caused fires in DIY situations, and we\'ve fixed several "I tried to replace it myself and now it\'s smoking" laptops.
The MacBook adhesive complexity. Modern MacBook batteries are bonded with strong adhesive that resists casual prying. The right approach involves solvent applied carefully through specific access points, then patient lifting. The wrong approach involves prying, bending, and sometimes punctures. We see this regularly.
The trackpad cable on MacBooks. The MacBook trackpad cable runs underneath the battery on most models. DIY removal sometimes damages this cable, turning a battery replacement into a battery-plus-trackpad repair. We know to lift around the cable.
The disposal question. Old lithium batteries don\'t go in regular trash. They need to go to proper recycling channels for hazardous materials. Most customers don\'t know where to take them; we handle it.
None of these are showstoppers if you know what you\'re doing. They are reasons that bringing the laptop to a shop is often the safer path, especially on MacBooks and any laptop with adhesive-mounted batteries.
Why Choose Us for Battery Replacement in the Amherst & Buffalo Area
You have options. Big-box retailer service counters, manufacturer warranty (where applicable), national chains, online services that ship the laptop somewhere, other local shops, and DIY for the brave.
The work happens here. Your laptop doesn\'t get shipped anywhere. Disassembly, battery installation, calibration, and verification all happen on our bench in our Amherst shop.
We diagnose before we quote. Free diagnostic. We don\'t reflexively quote a battery replacement when a charging port repair, charger replacement, or settings adjustment will fix the actual issue.
Real parts. Reputable suppliers with consistent cell quality. We don\'t use the bottom-tier batteries that lose capacity quickly or fail unsafely.
Mac and PC, both. MacBook batteries and PC laptop batteries, every week. We know the model-specific quirks: pentalobe screws on MacBooks, adhesive removal techniques, the battery part variants for each major laptop line.
Safe handling. Swollen batteries are handled with care. Old batteries get recycled properly through hazardous-material channels.
No upselling. If your laptop needs a battery, that\'s what we quote. We don\'t pad with software services or extended warranties you didn\'t ask for.
Real warranty on the work. Manufacturer warranty on the battery plus our installation labor warranty.
We\'re located on North French in the Amherst / Tonawanda area, easy access from I-290, Sheridan Drive, Maple Road, and Niagara Falls Boulevard. Customers regularly drop off from across Western New York.
How Pricing Works for Battery Replacement
The total has two parts: the battery itself (varies by model, with common laptop batteries being affordable and MacBook batteries being more involved) and the labor to install (varies by how involved the swap is).
Removable-battery business laptops are quick. Internal-screw-mounted batteries are straightforward. Adhesive-mounted MacBook batteries take more time and care. We tell you up front what your specific laptop\'s job looks like.
What we can promise:
- The diagnostic is free. We tell you whether it\'s actually a battery issue or something else.
- Real number with a real breakdown before any work happens.
- The price we quote is the price you pay, unless we find something genuinely unexpected.
- You can walk away after the diagnostic with no charge.
- If the battery cost is approaching the value of the laptop, we tell you.
Get a Free Quote on Your Battery Replacement
Tell us your laptop model and what\'s wrong with the battery. We\'ll give you a real range before you bring it in.
Request a Quote or call 716-771-2536
Service Areas for Battery Replacement
- Amherst, NY
- Buffalo, NY
- Williamsville, NY
- Tonawanda, NY
- Cheektowaga, NY
- Clarence, NY
- Kenmore, NY
- Lancaster, NY
What to Do Right Now If Your Battery Is Failing or Swollen
If your battery is visibly swollen, stop using the laptop and bring it in soon. Don\'t close the lid hard. Don\'t leave it charging unattended. Don\'t throw it in a bag where it might get pressure on it. Swollen batteries get worse over time and become a real fire hazard if they\'re punctured.
If your battery just won\'t hold a charge anymore, you have time. Plug into a surge protector with battery backup if you have important work, schedule a drop-off when convenient, no urgency.
Note your laptop\'s model. Sticker on the bottom or System Information / About This Mac. Knowing the model lets us order the right battery in advance.
Call 716-771-2536 to schedule. Most jobs come back within 24 to 48 hours.
Looking for platform-specific battery replacement info?
We have dedicated pages for each platform:
- MacBook battery replacement covers MacBook Air, MacBook Pro, and the adhesive removal process modern MacBooks require
- PC laptop battery replacement covers Dell, HP, Lenovo, ASUS, Acer, gaming laptops, and business laptops
Frequently Asked Questions
Real questions we get asked about laptop battery replacement.
