Cranked flash light

Discussion in 'General Electronics Chat' started by tfarawi5, Feb 14, 2011.

  1. tfarawi5

    Thread Starter New Member

    Jan 25, 2011
    7
    0
    Hey I recently took apart one of those manually crank LED flashlights, and noticed that the battery was 3.7V lithium ion, does anyone know a way to adapt the crank flash light to charge a bigger battery like maybe a 9V.?

    Thanks
     
  2. PackratKing

    Well-Known Member

    Jul 13, 2008
    850
    215
    Wouldn't this depend on how much raw voltage the little generator in there is capable of ?
     
  3. Markd77

    Senior Member

    Sep 7, 2009
    2,803
    594
    How about 3 AA NiMH batteries, they would store much more power and the voltage is about right. You could use a boost converter with this if you need higher voltage out.
     
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