Hello,
I have had my MBA since November 2019.
I use the Battery Health 2 app. I noticed quite quickly my battery health decreased from 100% to 97% (after 7 charges) and now 96% (after 13 charges)
Image 1 taken 4th Feb
I always charge to 100% and let it run down to around 10%
Is the normal behaviour to lose 3% after only 7 charges? Or have I potentially got battery issue?
MacBook Air 13", macOS 10.15
I wouldn't worry about it.
For first few months these readings will be all over the place.
After few months if you find battery health deteriorate considerably, contact Apple.
Related:
https://www.apple.com/batteries/why-lithium-ion/
If your battery won’t charge
https://support.apple.com/guide/mac-help/if-your-battery-wont-charge-mh29198/mac
If your Mac battery runs out of charge quickly
If your Mac battery status is “Not Charging
If an X appears on your Mac battery icon
MacBook Air (2019) battery health
