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Hand cranked radio question

  1. Dec 4, 2008 #1
    hand cranked radio question (ignore - figured out)

    Your two friends argued whether they should crank more cycles (e.g. 180 cycles in 1 minute) or longer time (e.g. 180 cycles in 2 minutes) to efficiently charge the internal batteries. They couldn't conclude with their knowledge and decided to ask you about this. What would be your professional opinion?

    3. The attempt at a solution

    I'm not really sure on this one. It seems like speed would be a factor, but I'm not sure if the generator is only reliant on the number of turns. Can someone please help?
    Last edited: Dec 5, 2008
  2. jcsd
  3. Jan 18, 2009 #2
    They don't specify the type of battery but I'm assuming they aren't lead acid batteries. What do you know about recharging currents of non-lead acid batteries?
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