MacBook Air 15" M3 A3114 (2024) Battery Replacement

MacBook Air 15" M3 A3114 (2024) Battery ReplacementMacBook Air 15" M3 A3114 (2024) Battery Replacement Compatible models: A3114, EMC 8750 The MacBook Air 15 inch M3 carries the same 66. 5Wh cell as its M2 predecessor but pairs it with the more efficient M3 chip and Wi Fi 6E. The result is a machine Apple positions as delivering 18 hours in everyday use. The 15 inch Liquid Retina display is the largest available in the Air range, and it draws more power under real conditions than the quoted figure

MacBook Air 15" M3 A3114 (2024) Battery Replacement

Compatible models: A3114, EMC 8750

The MacBook Air 15-inch M3 carries the same 66.5Wh cell as its M2 predecessor but pairs it with the more efficient M3 chip and Wi-Fi 6E. The result is a machine Apple positions as delivering 18 hours in everyday use. The 15-inch Liquid Retina display is the largest available in the Air range, and it draws more power under real conditions than the quoted figure assumes. When the battery degrades, the 15-inch screen's constant power demand means the drop in runtime is felt immediately during any productive working day.

• Turnaround: Same day where possible, subject to stock and workload
• 6-month warranty on the replacement battery
• Walk-in near Liverpool Street Station or use our UK mail-in service

Signs your MacBook Air 15" M3 battery may need replacing

M3 efficiency improvements over M2 mean the A3114 gets slightly more from each charge cycle when healthy. That same efficiency makes degradation more apparent, because users have higher expectations set by what the machine delivered when new.

• Battery draining significantly faster than it used to
• Device shutting down unexpectedly, particularly at lower charge percentages
• Only running reliably when connected to power throughout the day
• Battery percentage dropping suddenly or behaving inconsistently
• MacBook running warmer than usual during normal tasks
• Screen lifting slightly from the chassis (can indicate a swollen battery, book as soon as possible)
• Low Power Mode activating earlier in the day than expected, indicating the system is compensating for reduced battery capacity
• Go to Apple Menu > About This Mac > System Information > Power, then check Cycle Count and Condition

What is included

• Safe removal of the bottom case and existing battery
• Fitting of a quality replacement 66.5Wh battery cell
• Post-repair charging and power stability checks
• Full function test covering power, MagSafe 3 charging, keyboard, trackpad and display
• 6-month warranty on the replacement battery

How to confirm your model

Go to Apple Menu > About This Mac > System Report > Hardware Overview to check your model identifier.

This repair covers: A3114, EMC 8750.

The model number is also printed on the underside of the machine near the hinge. If you are unsure, bring the MacBook in and we will confirm the model before starting any work.

The A3114 uses MagSafe 3 and supports USB-C Thunderbolt charging through both ports. If you are unsure whether your 15-inch Air is the M2 or M3, check Apple Menu > About This Mac for the model identifier A3114.

Our repair process

1. Book or drop in: Book online or visit us near Liverpool Street Station. Mail-in customers can send their MacBook from anywhere in the UK by tracked post.
2. Assessment: We inspect the machine before starting. If we find anything unexpected, we tell you before proceeding.
3. Battery replacement: We remove the bottom case, extract the old battery and fit the replacement, then reassemble and reseal carefully.
4. Testing: Full post-repair checks covering power, charging and all core functions before the machine is returned.
5. Collect or return post: Pick up in store or we return your MacBook by secure tracked post.

Why choose Square Repair?

• Established repair centre near Liverpool Street since 2015
• 6-month warranty on every battery replacement
• No data loss, battery replacement is a hardware-only procedure
• Post-repair testing before handover on every job
• Transparent pricing with no hidden charges
• Walk-in and UK mail-in options available

Before you book

• If the chassis is bent or the machine has been previously opened, we will advise on any complications before starting
• If there has been liquid exposure, a battery replacement may not resolve all issues. We confirm our findings before proceeding
• If the screen is lifting slightly from the chassis, book as soon as possible. This can indicate a swollen battery that needs urgent attention
• If the machine is completely dead, we carry out a diagnosis before confirming the repair

Related MacBook Air 15" M3 repairs

• All MacBook Air 15" M3 repairs
• Book your battery replacement
• How our repair service works
• MacBook diagnosis service

Book your repair

Walk-ins are welcome during opening hours near Liverpool Street Station. For mail-in repairs, place your order online so we can track your MacBook from arrival. Any questions about the battery options for your MacBook Air 15" M3? Contact us and we will help.