Need a battery replacement for your MacBook Air M4? We carry out this work in-house at our London workshop, with a fixed quote before we start.
The M4 Air battery should still be healthy on most units. If it isn’t, check whether you’re covered by Apple’s warranty first. Out of warranty, we replace it using the pull-tab design and test charging on all ports.
If a battery on an M4 Air is failing early, that points to a fault or damage rather than wear. We check for liquid or impact damage before replacing it.
About this model: The M4 MacBook Air (2025) keeps the flat-edged design but adds 16GB memory as standard, a 12MP Center Stage camera and a sky blue finish. It’s young enough that many are still under Apple’s warranty or AppleCare+, and we’ll tell you if yours is.
Signs it needs a battery replacement
- Battery health dropping quickly
- Not charging
- Swelling
- Unexpected shutdowns
How we do it
First we confirm the battery really is the problem: cycle count, reported condition, and a check of the charger and charging circuit.
Adhesive holds the pack to the case, so patience matters more than speed. We protect the trackpad and speaker cables while the old cells come out.
We then calibrate the new battery, confirm it charges from every port, and dispose of the old cells through a proper battery recycling route.
At a glance
| Years | 2025 |
|---|---|
| Processor | Apple M4, fanless |
| Storage | Soldered to the logic board |
| Memory | Unified memory inside the chip package (not upgradeable) |
| Battery | Held with adhesive |
| Power / charging | MagSafe 3 plus two Thunderbolt 4 ports |
Before you bring it in
Back up your data if you can, note roughly how long a charge lasts now, and bring the charger too, so we can rule it out as the cause.
Which model do you have?
This page covers the MacBook Air M4 (13 & 15-inch, 2025) (MacBook Air (13-inch, M4, 2025) and MacBook Air (15-inch, M4, 2025)). Look under Apple menu > About This Mac, or check the small print on the bottom case for the A-number. Not sure? Bring it in and we’ll identify it for you.
Price
We give you a fixed quote for your exact model after a free initial assessment, before any work starts. All prices are subject to inspection, and nothing is done without your approval.
Questions we’re often asked
My Mac might still be under warranty. Should I come to you?
If the fault is a manufacturing defect and your Mac is within Apple’s warranty or AppleCare+, Apple is usually the cheapest route and we’ll tell you so. Accidental damage, spills and anything outside cover is where we can help, often faster.
How long will the new battery last?
A new battery should give you close to the run time it had when new, and typically lasts several years with normal use. Keeping it away from long periods at 100% charge and high heat helps it age more slowly.
Do you need to erase my Mac?
No. Your files stay where they are. We only need your password if you’d like us to test macOS after the repair, and we’ll ask before we log in.
Is there a warranty?
Yes, our repairs come with a warranty on the work and parts. Ask us for the terms that apply to your repair.
Book a repair
For a free, no-obligation quote, call 020 7394 2528 or email info@mac-repair.london.