What's changed? Are you using battery optimizer? What's your Performance mode setting? Have you tried clearing cache? What apps are using up battery? What's your battery graph look like?
Others might have more questions, so please jump in!
My S7 Edge is showing also 10 hrs and 30 minutes after
full charge. Using Nougat and i notice that battery life is
awful. turned off all settings that drains battery. Used skype for 1 hour and my battery is down to 75%.
By the way after i updated i did a restore factory and clear cache..My a5 2016 in marshmallow battery life is better than my s7 edge.