I remember reading a couple of years ago that it is bad for one's mobile phone to charge it to 100% and have it below 30%… I tried to keep my phone within that range and the battery lasted for about 3 years, which is average.
I wonder if it is still valid for new phones? Thanks.
I have an iPhone 6 and regularly drain the battery to 5%, and charge it to 100% every night, leaving it on charge over night. The battery health shows as being 92%.