Apple's latest MacBook Air M5 delivers impressive performance improvements but shows a slight regression in battery life compared to the M4 model, particularly at maximum brightness.
The new MacBook Air 13 with M5 chip has arrived, bringing notable performance upgrades while maintaining the sleek design users expect. In our testing, the base model equipped with 16GB of RAM and 512GB of storage earned an impressive 92% 'very good' rating. However, one aspect that deserves closer examination is the battery performance compared to its predecessor.
Battery Life Test Results
When we subjected the MacBook Air 13 M5 to our standard WLAN test at 150 nits of brightness, it lasted 16 hours and 11 minutes. This is practically identical to the 16 hours and 13 minutes achieved by last year's M4 model at the same brightness level. The real difference emerges when testing at maximum brightness, where the M5 managed 6 hours and 39 minutes, representing a 6% decrease compared to the M4's 7 hours and 5 minutes.
Interestingly, the M5's battery life at maximum brightness is nearly identical to that of the two-year-old MacBook Air 13 M3, suggesting that Apple may have prioritized performance gains over battery improvements with this generation.
The Technical Explanation
The reason for this battery life stagnation becomes clear when examining the hardware specifications. Both the M4 and M5 MacBook Air models contain the exact same 53.8 Wh battery capacity. Apple has essentially maintained the same battery size while significantly increasing computational power.
The M5 chip delivers meaningful improvements in both single-core and multi-core performance compared to the M4. This represents an engineering trade-off: Apple managed to keep battery life consistent while boosting processing capabilities. For users who prioritize performance over maximum endurance, this is likely an acceptable compromise.
Context and Comparison
While the MacBook Air M5 shows no battery life improvement over the M4, it's important to note that 16+ hours of endurance at moderate brightness is still exceptional by industry standards. The laptop will easily last through a full workday for typical productivity tasks.
In the broader Windows laptop market, some models do offer superior battery life, particularly those with larger batteries or more power-efficient processors. However, very few Windows laptops can match the MacBook Air's combination of performance, build quality, display quality, and battery efficiency in a similarly lightweight package.
Who Should Buy the M5 MacBook Air
The MacBook Air 13 M5 remains an excellent choice for:
- Users who prioritize performance and need faster processing for creative work or development
- Those who primarily work at moderate display brightness levels
- Existing M3 or M4 owners looking for a meaningful performance upgrade
- Users who value the macOS ecosystem and build quality
For users whose primary concern is maximum battery life at full brightness, the M4 model might still be the slightly better choice, or they might consider Windows alternatives with larger batteries. However, for most users, the M5's performance improvements justify the minimal battery trade-off.
The MacBook Air M5 demonstrates Apple's continued focus on delivering balanced computing experiences where no single aspect is sacrificed completely. While battery life didn't improve, the performance gains are substantial, and the overall endurance remains class-leading.
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