I may follow your proven procedure and update. 
Don't reckon it could do that much damage. Might help battery life. 
It's 1100 am and I have 35% left and I took my phone off charge at 6am.
No phone calls, little bit music streaming, no sync, Wifi off. Screen on full but still... 
That's pathetic. 
Sincerely, 
An amazing S4