MacBook Air battery life
MacBook Air battery life: Apple rates the M3, M4 and M5 at 18 hours of video, rundowns land at 15 to 18 hours, and 1,000 charge cycles last years. UK prices.
On this page
How long does a MacBook Air battery last?
A MacBook Air battery lasts 15 to 18 hours on one charge, and the M3, M4 and M5 generations are rated identically by Apple at 18 hours of video and 15 hours of web use. The Apple MacBook Air 13-inch M5 costs £1,249.97 on Amazon UK at the time of writing (October 2026) and Notebookcheck measured 16 hours 11 minutes of Wi-Fi use at 150 nits.
The wider buying decision is in Is a MacBook Air worth it?.
| Situation | Answer | Pick |
|---|---|---|
| A full working day away from a socket | Yes, 15 to 16 hours measured | Apple MacBook Air 13-inch M5 |
| Two days of light use between charges | Yes, at around 6 hours a day | Apple MacBook Air 15-inch M5 |
| Longest rated life of any MacBook | 24 hours of video (Apple) | Apple MacBook Pro 14-inch M5 |
| Cheapest MacBook, shorter web life | 11 hours of web use (Apple) | Apple MacBook Neo |
Is the M4 or M5 MacBook Air battery better than the M3?
No, not on Apple's ratings: the company lists the same 18 hours of video and 15 hours of web use for the M3, M4 and M5 MacBook Air, in both 13-inch and 15-inch sizes. Apple spent the newer chips' efficiency gains on speed, not on hours.
| Model | Battery | Video rating | Web rating | Draw per rated video hour |
|---|---|---|---|---|
| MacBook Air 13-inch M3 (2024) | 52.6 Wh | 18 h | 15 h | 2.92 W |
| MacBook Air 13-inch M4 (2025) | 53.8 Wh | 18 h | 15 h | 2.99 W |
| MacBook Air 13-inch M5 | 53.8 Wh | 18 h | 15 h | 2.99 W |
| MacBook Air 15-inch M5 | 66.5 Wh | 18 h | 15 h | 3.69 W |
| MacBook Neo (A18 Pro) | 36.5 Wh | 16 h | 11 h | 2.28 W |
| MacBook Pro 14-inch M5 | 72.4 Wh | 24 h | 16 h | 3.02 W |
The watts column shows where hours come from. The MacBook Air 13-inch M5 averages 2.99 W against 2.92 W for the M3, so the generations are equal. The MacBook Neo draws only 2.28 W, but its 36.5 Wh cell caps web use at 11 hours. The 14-inch MacBook Pro M5 matches the Air's draw at 3.02 W; its 24 rated hours come from a 72.4 Wh battery, 35% bigger than the Air 13-inch's 53.8 Wh. The M5 chip itself changed little: Apple's Pro rating stayed at 24 hours, and the head-to-head is in MacBook Pro M4 vs M5.
How long does the MacBook Air M5 battery last in real use?
15 to 18 hours, depending on brightness and workload. The table collects named independent rundowns: screens at 150 nits match Apple's web rating, and maximum brightness cuts it by more than half.
| Source | Model | Workload | Result |
|---|---|---|---|
| Laptop Mag | 13-inch M3 | Web, 150 nits | 15 h 13 min |
| Laptop Mag | 13-inch M4 | Web, 150 nits | 15 h 42 min |
| Notebookcheck | 13-inch M4 | Wi-Fi, 150 nits | 16 h 13 min |
| Notebookcheck | 13-inch M5 | Wi-Fi, 150 nits | 16 h 11 min |
| Notebookcheck | 13-inch M5 | Wi-Fi, maximum brightness | 6 h 39 min |
| Tom's Guide | 13-inch M5 | Web, 150 nits | 15 h 37 min |
| CNN Underscored | 13-inch M5 | 4K video loop | 16 h 38 min |
| Macworld | 13-inch M5 | Movie loop, 150 nits | 18 h 24 min |
Two readings matter. Laptop Mag put the M4 29 minutes ahead of the M3 (3.2%), and Notebookcheck found the M5 two minutes behind the M4 and about 6% shorter at maximum brightness, so the chip generation does not decide battery life. Brightness does: 6 hours 39 minutes at full brightness is 59% shorter than 16 hours 11 minutes at 150 nits.
How many charge cycles does a MacBook Air battery last, and what does a replacement cost?
Apple designs Mac notebook batteries to keep up to 80% of capacity through 1,000 complete charge cycles. A cycle counts total use equal to 100% of capacity, so two half-discharges make one cycle. Compare Electronic divided Apple's 15-hour web rating into daily battery hours to estimate the years to 1,000 cycles.
| Daily hours on battery | Cycles a day | Years to 1,000 cycles |
|---|---|---|
| 2 hours | 0.13 | 20.5 years |
| 4 hours | 0.27 | 10.3 years |
| 6 hours | 0.40 | 6.8 years |
| 8 hours | 0.53 | 5.1 years |
A buyer who works 6 hours a day unplugged reaches 1,000 cycles in about 6.8 years, past most laptop upgrade cycles. A replacement is not cheap: iCorrect lists £299 for a MacBook Air M4 battery replacement, 23.9% of the £1,249.97 MacBook Air 13-inch M5 price. Apple states its own out-of-warranty fee after diagnosis, and AppleCare+ covers battery service below 80% capacity. Wider longevity numbers are in How long does a laptop last?
Which MacBook has the best battery for the money?
The Apple MacBook Air 13-inch M5 gives the best battery for the money, at £1,249.97 on Amazon UK at the time of writing (October 2026). Apple rates it at 18 hours of video from a 53.8 Wh battery, and independent rundowns reach 15 to 18 hours.
Apple MacBook Air 13-inch M5 battery and power (Apple)
- Battery: 53.8 Wh lithium-polymer
- Rated life: up to 18 hours video, 15 hours web
- Design life: 80% capacity through 1,000 cycles
- Charging: MagSafe or USB-C
- Weight: 1.23 kg
Apple MacBook Air 13-inch M5 - pros and cons
Where to buy
Check price
Three alternatives cover larger batteries and a lower price, at Amazon UK prices in October 2026.
Also consider
Radar · 0-100 scores
- MacBook Air 13-inch M5 (16GB, 512GB, Midnight)
- MacBook Air 15-inch M5 (16GB, 512GB)
- MacBook Neo
- MacBook Pro 14-inch M5 (16GB, 1TB, Space Black)
Verdict
A MacBook Air battery gets through a working day: 15 to 18 hours in independent rundowns, identical on the M3, M4 and M5. The Apple MacBook Air 13-inch M5 at £1,249.97 is the pick, and the Apple MacBook Pro 14-inch M5 at £1,899.97 is the choice for the longest rated hours. Model prices are in Which MacBook should I buy?, and the Air-or-Pro decision is in MacBook Air vs MacBook Pro UK 2026.
Frequently asked questions
How long does a MacBook Air battery last?
Apple rates every MacBook Air from the M3 to the M5 at up to 18 hours of video streaming and up to 15 hours of wireless web use. Independent rundowns at 150 nits land between 15 hours 13 minutes (Laptop Mag, M3) and 18 hours 24 minutes (Macworld, M5 movie loop). The battery itself is designed to keep 80% of its capacity through 1,000 charge cycles.
How long does the MacBook Air M5 battery last?
Between 15 and 18 hours, depending on the test. Tom's Guide recorded 15 hours 37 minutes of web surfing at 150 nits, Notebookcheck 16 hours 11 minutes over Wi-Fi, CNN Underscored 16 hours 38 minutes of looped 4K video and Macworld 18 hours 24 minutes of looped movie playback. Notebookcheck measured 6 hours 39 minutes at maximum brightness.
Is the MacBook Air M4 battery better than the M3?
Marginally. Apple rates both at 18 hours of video and 15 hours of web use. Laptop Mag recorded 15 hours 42 minutes for the 13-inch MacBook Air M4 against 15 hours 13 minutes for the 13-inch MacBook Air M3, a 29-minute or 3.2% gap that Laptop Mag itself called too small to affect a buying decision.
Does the Apple M5 chip change MacBook battery life?
Barely. Apple's ratings did not rise with the M5: the MacBook Air stays at 18 hours of video and the 14-inch MacBook Pro M5 at 24 hours. Notebookcheck measured 16 hours 11 minutes on the MacBook Air 13-inch M5 against 16 hours 13 minutes on the M4, and found about 6% shorter life at maximum brightness. Apple spent the M5's gains on speed.
How many charge cycles does a MacBook Air battery last?
Apple designs Mac notebook batteries to hold up to 80% of original capacity through 1,000 complete charge cycles. A cycle is 100% of capacity used in total, not one plug-in. At 6 hours a day on battery and Apple's 15-hour web rating, a MacBook Air uses 0.4 cycles a day, reaching 1,000 cycles in about 6.8 years.
How much does a MacBook Air battery replacement cost in the UK?
iCorrect lists £299 for a MacBook Air 13-inch or 15-inch M4 battery replacement, which is 23.9% of the £1,249.97 Amazon UK price of the MacBook Air 13-inch M5 at the time of writing (October 2026). Apple confirms its own out-of-warranty fee after diagnosis, and AppleCare+ covers battery service when capacity falls below 80%.