5 Signs It’s Time to Replace Your MacBook Air Battery

Swelling in the MacBook Air case If the trackpad feels clicky or uneven, or the case is bulging, stop using the laptop immediately. That is a fire risk and needs a battery replacement right away.

Rapid battery drain If you need to charge twice a day for light use, or the laptop shuts down at 20% battery, the battery is worn out. Replace it.

High cycle count Check System Report → Power → Cycle Count. Apple rates modern Airs for 1000 cycles, but start planning a swap past 500 cycles if you notice degradation.

“Service Recommended” warning When that message appears in the battery menu, it is not a suggestion. It means the battery needs replacement.

Slower performance A weak battery can cause the system to throttle the CPU to protect itself. Replacing the battery can restore full speed.