If you’re tired of waking up having forgotten to charge your smartphone, and realize that a relatively high amount of battery has been reduced considerably, you are not managing your device’s functions properly. If you run out of juice much quicker than you think you should be, the chances are, a few tweaks and alterations to the way you manage your handset could make all the difference. Deep Sleep Battery Saver wants to help with the science of battery retention, by slipping your smartphone into a deeper sleep overnight -while you’re tucked away in bed.