Battery
My I phone 14 pro since 2 days suddenly goes off and the battery from 80% becomes 10% .. I have to recharge it every few hours to keep it running
Hi, this is probably a glitch on the iPhone.
I would try making a forced restart: Force restart iPhone - Apple Support
Also, you can try enabling the optimized battery charging option on the battery section.
If this issue persist you can try disabling some features that would help your battery life go through all day!