I wanted to build an easy flash light that last long and super
bright. This is what i came up with. I found
the bulb on Ebay for about $20 and found out it's operating
volts are about 3.6V-4.2V and 3 rechargeable batteries are rated @ 1.2 V
each but normally they run at about 1.33x3 which is ...By: watch81
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