iPhone 11 Pro Max battery charging issue after updating to IOS 17.1

Hi there,

I’m having a very unusual issue which I’ve never seen

before. Most probably after updating to IOS 17.1 I’m noticing this. When power

low, giving it to charge (I always do it when it goes down to 25-20%) and its

charging fine, Stock apple adapter, stock cable all are same since unboxing. Now

its charging as usual but just after 90/92% its not going above extremely slow

and after 96% not going above any more even if I left it for an hour. Even

somehow it goes to 100% quickly fall down to 97% and then instead of increasing

its sometime falling to 95% again increasing to 96% like this but not reaching

to 100% any more.

# Tried the recalibrate method: complete drain the battery until

device power off by itself then wait few hours and give it to full charge.

# Tried different adapter, cable, wireless charging, MagSafe

charging, Fast charging power banks, turning off “Optimized charging” but

nothing at all worked, all same.

Any idea what could be the issue? Thanks in advance.