
iPhone Air losing 25–30% battery per day with almost no use - any ideas?
I’m facing extremely high battery drain on my iPhone Air. It’s losing around 25–30% battery per day despite barely being used. Screenshot attached for reference.
Device stats:
62 cycle count (not my primary device)
100% battery health
Purchased 11 months ago
Things I’ve already tried:
Updated the software through an Apple Authorized Service Centre to 26.6.1
Had the device checked using Apple’s diagnostic software - no issues found
Backed up everything and completely erased the device, but the drain continued
Disabled Background App Refresh
Disabled both mobile data and Wi-Fi
Tested it in Airplane Mode
No obvious battery-draining features are enabled, such as Always-On Display
Despite all of this, the battery is dropping like a rock every day, even when the phone is essentially sitting unused.
Has anyone else experienced this with the iPhone Air? What could be causing this, and is there anything else I should try before taking it back to Apple?