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Switchmode LED flashlight upgrade
Posted: June 1st, 2010, 7:42am MDT by Caleb Kraft
When [Neelandan]‘s cheap flashlight’s internal rechargeable battery died, he scrounged for a replacement. Ultimately, the brightness of the light suffered with his new battery, taken from an old cell phone since he had dropped the voltage a bit. Upon inspection he saw that he would have to swap the individual resistors for each lamp to [...]