I wonder. It takes 1 hour and 20 minutes for my s6 for fast charge and 2 hour and 30 minutes if fast charge is turned off. But some s6 users here told it takes 1h30m for their s6 for fast charge and 1h40m for normal charge.
Yours is android 5 or 6? I don't understand if normal takes only 10 mins over fast charge, why we use fast charge?