3 Things to Know About MacBook Battery Health vs. Cycle Count

Cycle count is not a hard expiration date Apple rates modern MacBook Airs (2020 M1 and later) for 1000 cycles, meaning the battery should retain at least 80% capacity after that many full charges. Your Mac will keep working fine past 1000 cycles—the battery just won’t hold as much charge.

Battery health percentage is what matters A battery with 300 cycles and 92% health is fine. A battery with 200 cycles and 78% health is failing. Cycle count is a rough proxy, not a diagnosis.

Replace the battery when health drops below 80% Check health by holding Option and clicking the battery icon, or via System Settings → Battery. Once health falls under 80%, you’ll notice worse runtime—that’s when to consider a replacement, not at some magic cycle number.