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European iPhones are more fun now
(www.theverge.com)
This is a most excellent place for technology news and articles.
Can you really guarantee that? I mean, it's pretty much dependent on individual usage.
Sure you can. Car manufacturers do it today.
You will have to define "3 years" as well. It can't be a blanket 3 calendar year thing, it would have to be X number of cycles which the average user would realistically hit with 3 years of usage. Not someone glued to their phone playing games all day that need to charge three times a day.
Yup, probably one charge from 20% to 80% every day or something like that.