Avatar - Mark Hutchison
Mark Hutchisonadded this to Picks
How To Build A Flashlight That Runs On Dead Batteries

How To Build A Flashlight That Runs On Dead Batteries

Popular Science - By Sean Michael Ragan

The dead shall shine again Don’t throw out that seemingly lifeless battery—it’s not dead yet. A brand-new alkaline battery cell has an electric potential of about 1.5 volts, which drops as the juice runs out. The voltage eventually becomes too low to power most devices, but there’s still energy …

View on popsci.com