Most anytime I plug mine in before bed and take it off in the morning. A few times I didn't remember it was on the charger until the following afternoon. No issues. A few nights back I grabbed the wrong charger even, the Turbo Charger for my Droid Turbo (I keep all my chargers on a power strip). I was a bit worried, even though I've read that charger was backwards compatible, now I know it is.