Learn how to turn a crank flashlight into your own personal charger!

Step 1: Take apart your crank flashlight

Remove all screws and separate the two pieces of plastic, covering the flashlight. 
<p>This is dangerous and likely to damage your phone battery as there is no voltage regulator and spikes from rapid winding could ruin your phone</p><p>As dan2525 said, you need at least a zener diode AND a resistor in a small circuit to prevent damage.</p><p>Just buy a crank flashlight with the USB port already built in. It saves hours of work and is read to go, and you also have a working rechargeable flashlight</p>
U could buy a Zener diode to Attach to blue wires so u don't worry about messin up your phonr

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