iPhone Batterie Verbrauch sehr hoch

Hallo !

iohone 7 with latest IOS

apple changed battery 6 months ago since the battery was blown up and increased in size

i now recognize extremely short battery power times, e.g in standby, no usage, no app loaded at all is about 6hours from 100% to Zero. For normal

use the phone dies after 3 hours, it used to last the day easily.

all background loading is switched off.

all Apps used massively burn the battery.

i was with apple support in a store, they checked the battery, menu says battery is very ok (which I can See too) and could not help at all

any suggestions what to do ?

Best regards - Gregor