
Apple claims both laptops get 18 hours of battery life. They have identical 53.8Wh batteries. So what's actually different? The test results tell an interesting story.
At typical brightness indoors (around 150 nits):
They're basically the same. The M4 actually lasted 2 minutes longer in one test, which is statistically meaningless.
In video playback tests:
That's 14% better on the M5 MacBook Air, likely thanks to improved media engine efficiency. Apple didn't even advertise this.
At full screen brightness:
The M4 lasts about 26 minutes longer at maximum brightness. The M5's faster chip requires slightly more power when everything is pushed to the limit.
Unless you regularly work outside or in extremely bright environments, this is a non-issue. Both laptops easily last a full workday and more at normal brightness settings.
The 6% difference at maximum brightness only affects outdoor workers or those who prefer blindingly bright screens.
Both include similar chargers and take about 2 hours for a full charge. No advantage either way.
Don't choose between M4 and M5 based on battery life. They're practically identical for real-world use. Make your decision based on storage, performance, or price, knowing battery life is excellent on both.
Here's our "TLDR" Review
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If you're still curious about the Apple MacBook Air 2025 13-inch with M4 Chip, here are some other answers you might find interesting:
The M5 MacBook Air comes in four colors: Midnight, Starlight, Silver, and Sky Blue. All have identical specifications, so this decision is purely about what makes you happy when opening your laptop.
| Color | Character | Fingerprint Resistance | |-------|-----------|----------------------| | Midnight | Dark, sleek | Shows them most | | Silver | Classic, professional | Hides them best | | Starlight | Warm, subtle | Good | | Sky Blue | Modern, distinctive | Good |
Appears almost black in most lighting. Very sleek and professional.
The fingerprint reality: Apple improved the coating starting with M3, but it remains a fingerprint magnet. Users describe it as requiring regular wiping to look pristine.
Choose if: You love the dark aesthetic and don't mind maintenance.
The original MacBook color. Clean, timeless, professional.
Fingerprints: Best at hiding them. Most forgiving option for busy users.
Choose if: You want zero maintenance and a classic appearance.
A subtle gold/champagne tone. Not too bold, not too cold.
Fingerprints: Good. Comparable to Silver.
Choose if: You want something distinctive without being flashy.
Apple's newest color, introduced with M3. A sophisticated light blue.
Fingerprints: Good. Similar to Silver and Starlight.
Choose if: You want personality without the fingerprint complications of Midnight.
Some users miss Space Gray, discontinued with the 2022 redesign. Midnight is the closest option but isn't identical.
Check colors in person at an Apple Store if possible. They look different under various lighting conditions. What appears appealing in promotional photos might differ from your preference in reality.
Both M4 and M5 MacBook Air models start at 16GB RAM. That's a welcome improvement from the 8GB base on earlier generations. But do you need more?
Apple's unified memory is more efficient than traditional RAM. The CPU and GPU share memory intelligently, so 16GB on an M5 often performs like 24-32GB on older Intel machines. Keep this context in mind.
When you exceed physical RAM, macOS uses the SSD as virtual memory (swap). The M5's extremely fast SSD makes light swapping nearly imperceptible. Heavy swapping, however, affects performance and SSD longevity.
These prices are steep, but RAM cannot be upgraded after purchase. This is a one-time decision.
Apple Intelligence is Apple's on-device AI system, and the M5 MacBook Air is significantly better at running it than the M4.
These are substantial improvements for AI-specific workloads.
Writing Help: Rewrite, proofread, and summarize text across apps. Works in Mail, Notes, Messages, and third-party applications.
Image Generation: Create images from text descriptions in Messages and Notes.
Photo Intelligence: Search photos by description, remove backgrounds, identify objects.
Siri Improvements: More natural conversations, deeper app integration, improved context understanding.
Email Management: Automatically summarizes long email threads and prioritizes notifications.
Audio Capabilities: Real-time transcription with speaker identification.
Both chips run ALL Apple Intelligence features. The difference is speed.
| Task Type | Noticeable Difference? | |-----------|----------------------| | Summarize one email | Minimal | | Quick Siri question | Minimal | | Generate an image | Yes (faster) | | Summarize lengthy document | Yes | | Batch AI operations | Definitely |
Most Apple Intelligence runs entirely on your device, keeping data private. The M5's better AI performance means more can happen locally instead of going to Apple's servers.
If you use local LLMs (Ollama, LM Studio), machine learning models, AI-powered creative tools, or code completion AI, the M5's neural improvements provide genuine workflow benefits.
The bottom line: Apple Intelligence works well on both M4 and M5. The M5 is faster, which matters most for heavy AI users. For casual Apple Intelligence features, both handle everything smoothly.
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