30 minutes is usually long enough, although I usually leave it longer than that because I'm still doing stuff. The last 5% charge is a lot slower, but isn't re

30 minutes is usually long enough, although I usually leave it longer than that because I'm still doing stuff. The last 5% charge is a lot slower, but isn't really necessary -- it doesn't matter if the battery drains from 95%--45% rather than 100%--50%.