November 11, 2026
Swollen Phone Battery: When Fixing Beats Buying
The back cover has stopped sitting flat. Or, more precisely, it rocks when you press one corner. That is a swollen phone battery, and the next move is not a price check: power the phone off, unplug it, and only then decide whether to keep it, repair it or replace it. Below is the sum, and where it breaks.
Power it off and stop charging now; then repair the battery if the phone still has about a year or more of updates left, and replace the phone if not.
- Swelling is a safety fault, not ordinary wear, so it outranks any price sum.
- Inside the first year, claim a warranty repair before you pay for anything.
- Get the fee in writing, divide it by your months of updates left, and compare it with a new phone's monthly cost.
Why a swollen phone battery is a safety call first
A swollen battery is a damaged cell rather than a worn one, so safety comes first and the money question second, whatever the repair quote turns out to be.
The US Environmental Protection Agency's battery tip sheet (updated 22 July 2026) says swelling "is a sign of damage and defects in lithium batteries and can precede battery fires." So the answer to "can I keep using it?" is no. It also rules out curbside trash and recycling bins, so ask your local household hazardous waste program where a dead swollen phone goes.
Money is second, and someone else may pay first. Card benefits can stretch a warranty, as in who pays when a laptop fails after the warranty ends, and some states' rules, covered in US state right-to-repair laws after the warranty ends, may widen your repair options.
Four figures decide most of this: the free-repair window, a paid repair's opening price, the free swaps allowed and the wear line. Sources: Google's Pixel 7a page, Apple's service page and 9to5Mac, 17 September 2026.
Pixel 7a Free-Repair Window
3 years
Lapsed for buys before Nov 2023
Newest Pro-Class Battery Fee
$129
Opening price, not a final quote
Free Swaps Per Pixel 7a
1 swap
Google allows one per device
AppleCare+ Free-Swap Line
80%
Wear test, not a swelling test
That capacity line is a wear test. Apple's page does not say how a swollen cell is handled under AppleCare+, so a healthy reading settles neither safety nor coverage. Ask the counter and get the answer in writing.
Our view: a battery-health percentage measures wear, not swelling. A phone that reads healthy but sits warped on the desk belongs switched off, not plugged in.
Safety and warranty come first. The money turns on one comparison.
Is it worth replacing the battery or buying a new phone?
It is worth replacing the battery whenever the repair fee, spread over the months of security updates your phone still has, costs less per month than a new phone spread over its expected life.
Updates set how long a repaired phone stays worth owning, so the fee is spread across them; the new phone's price, after trade-in, is spread across the months you would keep it. The lower monthly figure wins. Our call: never judge the fee alone, because a repair on a phone about to lose updates is dear however small the fee.
Worked example: assume a $119 fee (the price MacRumors reports Apple has always charged for 16 Pro and 17 Pro models), 36 months of updates left, a $500 phone after trade-in and 48 months of life from it. Repair: $119 ÷ 36 = $3.31 a month. Replace: $500 ÷ 48 = $10.42 a month. Break-even: $119 ÷ $10.42 = 11.4 months. That is our arithmetic, not a published figure; it ignores resale value and any second fault.
Your sum takes a minute: divide your written fee by your months of updates left, then set it against the new phone's monthly cost. Then find your row below.
| If you | Do this | Because |
|---|---|---|
| Inside year one | Claim a warranty repair | Apple covers defects for 1 year |
| Pixel 7a owner | Check Google's repair page | Free fix if your purchase date qualifies |
| 12+ months left | Repair the battery | Fee spreads thinner than a new phone |
| Under 12 months | Price a new phone | Fee spreads over too few months |
| Anything else | Power off, get a written quote | Every other answer hangs on the fee |
Reading it: it answers how many months of updates a $119 repair needs before it beats a new phone's monthly cost. Derived by dividing the fee by months left and comparing the result with the worked example's new-phone figure.
The 12-month line is the default sum rounded up. A dearer new phone or a shorter life moves the break-even earlier; a cheaper phone moves it later.
Is a swollen battery covered by warranty?
Sometimes: Apple's Limited Warranty covers manufacturing defects for one year from purchase but not batteries that wear down from normal use, and its service page does not mention swelling, so a claim rests on how the fault is classified.
Our reading: swelling in the first year is a manufacturing fault, not wear, so ask for the repair in those words and keep the answer in writing. After that it is a paid repair unless a plan like AppleCare+ applies. If a seller refuses help on a recent purchase, see chargeback rights when a seller says no.
Check for a maker programme first. Google's Extended Repair Program for the Pixel 7a (announced 23 April 2025) offers one free replacement per eligible phone, with walk-in service in the US, within three years of the original retail purchase. On that wording, a 7a bought before 11 November 2023 is already outside it.
Waiting for Europe is the other trap. Compliancegate's summary of Regulation (EU) 2023/1542 reports that from 18 February 2027 users must be able to swap portable batteries, with spares on sale for five years after a model's last unit sells; phones that keep 83% of capacity at 500 cycles and 80% at 1,000, with IP67, may be exempt. We could not open EUR-Lex, so treat that as reported. Our arithmetic: a model last sold in December 2027 owes spares until December 2032, yet your phone is swelling now. If you replace, read a refurbished phone warranty first.
- Fees: Apple's page says tax may apply and shipping may be added, and 9to5Mac notes Apple inspects the phone to set the final fee, so get the total in writing.
- Shipping: the EPA tells collectors not to ship damaged lithium batteries by air, so ask how a mail-in service handles a swollen phone.
- Backup: do not plug in for a last backup; your current cloud copy is the copy.
Check these before you pay anything
- Your back or screen no longer sits flat, so it stays unplugged.
- Your purchase date is under a year ago.
- Your maker's repair page lists your exact model.
- Your written quote includes tax, shipping and inspection.
Our call: repair when your phone has about a year or more of updates left and the written fee is near Apple's Pro-class price; otherwise replace the phone. This week, power it down, get a written quote, and put that fee into the calculator above.
How we checked this
We read Apple's iPhone battery service page (copyright 2026, opened 11 November 2026), Google's Pixel 7a repair page (11 November 2026) and the EPA battery tip sheet (updated 22 July 2026). Apple's price estimator did not load, so fees are as 9to5Mac reports; EU terms are as Compliancegate reports, as EUR-Lex was unreadable. The worked example assumes a $119 fee, 36 months of updates, a $500 phone and 48 months of life. No product was tested hands-on for this article.
Last verified: 11 November 2026. Edited by G Ragu, reviewed after publication. Spotted something out of date? Tell us and we will correct it.
