Rayovac 312 [L312ZA] Zinc-air Hearing Aid Battery
This Rayovac 312 [L312ZA] 1.4 volt zinc-air hearing aid battery was
made by Rayovac Corp. of Madison, WI. in 2004.
This battery weighed around 0.02 oz., and measured 0.310" in
diameter by 0.140" in height.
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Top view of the Rayovac 312 [L312ZA] zinc-air battery showing the
negative terminal.
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Bottom view of the Rayovac 312 [L312ZA] zinc-air battery showing the
positive (+) terminal. Note the three holes in the bottom. These holes
let air into the battery to activate it. That is why it is called a
zinc-air battery.
Once the brown tab (below) is removed the battery starts working (and
thus running down) whether you use it or not.
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Bottom view of the Rayovac 312 [L312ZA] zinc-air battery showing the
brown tab covering and sealing the 3 air holes so the battery is not
activated and thus has a long shelf life. The brown tab is the
standard color for all 312-sized zinc-air batteries, no matter who makes
them.
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Front view of the Rayovac L312ZA 8-battery plastic blister pak.
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Rear view of the Rayovac L312ZA 8-battery plastic blister pak.
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Close-up of the Rayovac L312ZA 8-battery plastic blister pak showing the
plastic tab to access the batteries.
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Front view of one of Rayovac's free promotional paks with one 312A
"Ultra Pro Line" battery included.
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Rear view of one of Rayovac's free promotional paks with one 312A "Ultra
Pro Line" battery included.
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