How to enable or disable Optimized Battery Charging on iPhone?

here is uh battery house in the battery section in iphone settings and if you go to service or somewhere in this menu you can enable uh optimized battery charging i think it's turned on by default and what it does like to reduce battery edge in iphone learns from your daily charging routine so it can wait to finish charging past 80 until you need to use it so that's basically the idea of it so it's just it's this feature will reduce your battery engine a bit not sure if it it will completely like save your battery because on this phone as you can see like my batteries has 76 maximum capacity right now because it was used for years so now but it was always turned on with optimized battery charging so it helped a bit because yeah this phone is like three four years old but still still it works so that's that hope it can be helpful