The 12V Battery Hack that Saves You $40
12 Volt Battery Hack! You'll Be Surprised... - video powered by Metacafe
Did you know what is inside some batteries? About $40-worth of savings, it seems. Cut open an A23 battery (cost: 94ยข) and you'll find eight 1.5-volt button batteries, each of whose RRP is around $4.99.

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