If there’s ANYTHING worth learning about or worth inventing, it’s battery hacks or tips, or some kind of invention that makes batteries last forever. This website I found doesn’t present any great new technological device to save me $1000 a year, but it has some really neat tips! The one I found very useful is substituting quarters and C batteries when you need some D batteries. Sweet! There’s more to be found at Lifehacker, Top 10 Battery Tips.
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