Popular Mechanics have an article promoting a Batteriser type device that will save the planet from BIG BATTERY!
Larry Udell's Battery Saver claims 30% battery saving.
Batterier BUSTED testing video: https://www.youtube.com/watch?v=Tl90m2KHbNk
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NO SCRIPT, NO FEAR, ALL OPINION. An off-the-cuff Video Blog about Electronics Engineering, for engineers, hobbyists, enthusiasts, hackers and Makers. Hosted by Dave Jones from Sydney Australia.