1000 cycles is the magic number for MacBook Air battery replacement

Check the cycle count in System Settings > Battery > Battery Health (or System Information > Power), and consider replacement when it exceeds 1000.

On any modern MacBook Air, Apple rates the battery for 1000 charge cycles before it drops below 80% of its original capacity. You can check the exact number by clicking the Apple logo > About This Mac > More Info > System Report > Hardware > Power, then looking for “Cycle Count.” On macOS Ventura and later, it’s also under System Settings > Battery > Battery Health.

But don’t fixate on the number alone. If your MacBook Air dies faster than it used to, or you get the “Service Recommended” warning in the battery menu, replace it even if you’re under 1000 cycles. Weather, charging habits, and age