Basically the title is the whole question. Of course it can vary from day to day, but generally speaking, what is most common for you. Just got interested about how other people feel about this after I made the mistake of activating another 1 hour booster when the previous one ran out. For me the limit is about one hour and after that “oh, how did that tank get there” becomes a common theme in my games. Anyone out there who can play for six hours straight without any drop in performance?