How to maintain a good battery health

Hi,

you can find vary much ways on this part of Apple web site: Batteries - Apple

Remember to use only certified cables and Power adapters, use only Apple Approved external batteries (you can find into the Apple Stores or on the Apple On Line store.

Check your localization services and select only app or services you really need. You can also tour off the background apps update

Make sure that you have Optimized Battery Charging enabled on your iPhone

Settings > Battery > Battery Health > Optimized Battery Charging

The simplest thing to do is charge your phone overnight, every night.

If you want to read pages and pages about the battery, post back for some links.