Huh. How we got leak-proof (relatively speaking) batteries

[thewayne]

We have Ray-o-Vac to thank for it, the sealed battery was invented in 1940 and all production initially went into WW II.

http://www.wired.com/science/discoveries/news/2008/04/dayintech_0423

Comments

[silveradept]

And all our handhelds thank him for coming up with such an idea.