[user104658]

Originally Posted by LeatherTrumpet

1992 was around the time I got my first mobile

from the original carphone *****house shop in baker street


anyway

read this

http://time.com/4949569/mobile-phone-charge-overnight/

Even that says it takes a couple of years and is talking about iPhones which have notoriously poor battery lifespan.

I'm not saying it isn't bad for the battery; it is, eventually, but the sad fact is we live in a wasteful world of ever-advancing tech and the vast majority of people get a new phone every 24 months when their contract is up. You're not going to get a significant drop in battery life in 2 years with most modern smartphones.