A neat battery hack where an A23 battery is cut opened, revealing 8 smaller 1.5 volt button batteries that power various devices including calculators. According to the video, getting a similar button cost $4.99 whereas 2 A23 batteries that give 16 button batteries cost just $1.88. This translates to a savings of about $40.
Video: Metacafe
Tags: Battery | A23 | Button Battery
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