I was also able to do this with quick settings and it took no more than 5 seconds to do.
Since I have done this my battery is lasting longer. Right now it has used 34% of the battery in four hours. At this rate I will get about eight and one half hours before charging again. This is with moderate use. However my cell standby is still at 76%. Time without a signal 100%. Battery life is better than it was. Doesn't the battery quit drawing power when it is n sleep mode. I have noticed it keeps flashing on and off.