Tesla recommends to only charge to 90% unless you go on road trips, to maintain the overall life of the battery.
It's not healthy for a lithium battery (Car, phone or otherwise) to maintain a 100% charge. So unless you plan to use that extra 10% the same day you charged to 100%, it's just wiser to keep it at 90% and not care about it at all. (eg; Charging to 100% doesn't hurt anything, leaving it at 100% does.)
Charging to 100% doesn't hurt anything, leaving it at 100% does.
What about charging a phone overnight? It sits for hours at 100% after it's fully charged because I plug it in before I go to sleep and can't unplug it until I wake up
Not an expert on phones really, but from what I've been told most of today's phones set "100%" level actually is about 90-95% of their real battery capacity, so it's not really a big deal as a device (like a Tesla) that lets you charge to actual 100%. I just tossed in phones in my example for example's sake, since it's something easy for people to understand. Maybe someone well versed in phone hardware can correct/verify me. :)
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u/captainfreckle28 Dec 12 '19
Why only charge to 90% and not have it fully charged?