Akala ko di nagrorotate, may stopper pala sa back.. 95% upon opening, used it at lvl 60, after 10 mins 87% bat, so binaba ko sa lvl 20, malakas pa din naman yung hangin, after 9-10 mins, battery is at 76%.. havenβt tried yet how long till last till ma empty bat.. di din amoy sunog pag oprational