A more crude form of sapper since the 1870s

The Medical Electric Battery was introduced in the 1870's

http://medical-electric-battery.com/

Before that: Going all the way back to the 1750's

http://zapperdave.blogspot.com/2013/05/the-electric-cure.html

Before that:

The Wands of Horus ( Ancient Egypt )

The Rods of RA ( Ancient Egypt )

The Baghdad battery ( Ancient Sumeria ) may have been used to make Colloidal Silver

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