@taffcar1 If you go to Settings>Battery>Battery Health and Charging what does it say your battery health is ? If it’s below 80% you need to have the battery exchanged.
Batteries degrade the more you charge it and the iPhone is good for around 600 charging cycles before it gets to that 80% limit as that’s the battery degradation. So if you charge it from 0-100% that’s a cycle or 2 charging cycles from 50-100% or a cycle from 25% to 100 and then another charge from 25% to 50%. anything that add up to 100 is a cycle.
You get 12 months warranty on a battery so to have this fixed will be at your own cost to have this replaced you’ll be best of booking an apple appointment for a battery exchange and this will cost you £69. You can use THIS
