That's a bit higher than mine get. Hmmmm. Let it stop on it's own unless it goes much higher than that. Mine usually go to about 3.71, 3.72, etc etc. YOurs just seem to be going about .03 or .04v higher than mine. Might be a just a slightly different chemical makeup or different batch. You'll know that the cells didn't get full when you put your small charger on and it's a red light. If you put the small charger on and it's green, that means that it charged to full completion.