I'm on the fence with my 580 blower and 5 Ah battery combo. After reading all I could about run time on Full Turbo mode I am disappointed in it's run time. I'm using it in Canada strictly for fresh snow, getting after it the next day before it becomes hard. I'm getting 15-18 min. This is my second blower kit as the first one cratered on me, giving shocks and lost power on regular speed (3 weeks in) I live in the country and had to venture 90 min again to pick up the second one. I hoped the new one would last longer but no. It would be a great idea to offer a 7.5 Ah with a blower. I could use another 10 min of blow time. In Canada the 7.5 Ah costs the same as the 580 + 5.0 Ah kit. It would be nice to have a choice up front.