They usually just power things down to lower voltages, and allows down the performance of your device. It should not hurt anything! But, I get 12 hours off of normal settings on my device. Usually either your always on it...our something is not right. Why do you wish to leave it on all the time is the real question!?!
Well I brought it second hand and hammered it a bit because its so much better then my last phone, but now the battery seems to go down quite quick. Im recharging twice a day from 30%ish . Thanks BTW.
Ok well 16% should last an hour of solid usage! If not, then try and keep turning off phone once dead an completely discharge, then charge again with phone off