If one were to take into consideration that the cost to juice up an iPhone each year is more or less negligible, it would seem as though this might be some form of petty theft. However, despite being de-arrested, Lee was arrested again as it was alleged that he exhibited aggressive behavior toward a police community support officer.
I suppose having a power bank would make plenty of sense in this case, since you need not get yourself in such a sticky situation. Not only that, you should also look forward to iOS 9 since it is touted that iOS 9 will offer an additional hour of battery life the moment it is installed on your iPhone.