... for 3 minutes, until the batteries give out and they all need to be charged for 5-6 hours. (But actually, what is the battery life on these things? You sti

... for 3 minutes, until the batteries give out and they all need to be charged for 5-6 hours. (But actually, what is the battery life on these things? You still have the problem of heavier battery = more drain on battery. I wonder where the break-even point is?)