idk what to do | iPhone 15

I just hit 130 cycles on my iPhone 15 and it dropped to 96% (it was on 97 for two months I think) is this even normal?

I got the phone in October 2025 and I feel it decreased fast but I’m not so sure because it’s my first time with an iPhone

I’m also on the 20-80 method but the other day i accidentally fell asleep while charging it and it got to 98% and idk if that’s the reason? what to do to stop dropping so much!!