This 312 Naccon Zinc Air hearing aid battery gives you the power you need at the value you want. Easy to replace and comes in an economical and convenient 6 pack
Size 312 Zinc
Air Batteries - 6 Pack
Characteristics
Metal Air battery cells using zinc-air technology are energized only when
atmospheric oxygen is absorbed into the electrolyte through a gas-permeable,
liquid-tight membrane. With the removal of a sealing tab, oxygen from the air
is introduced into the cell. A zinc-air battery usually reaches full operating
voltage within 5 seconds of being unsealed.
The zinc air cell is basically a primary battery. They use the oxygen
content of the air as active mass. The positive electrode is a porous body made
of carbon with air access. Atmospheric oxygen is reduced at this electrode. The
active mass is thus not contained in the electrode but is taken from the
surrounding air as it is needed. The initial weight of the battery is reduced
accordingly. The negative electrode consists of zinc. An aqueous solution of
potassium hydroxide serves as the electrolyte.
The cell voltage for the chemistry is theoretically capable 1.65 Volts
however almost all designs are optimised for less than 1.4 or 1.3 Volts in
order to achieve longer lifetimes.
Advantages
High energy density but low power
Inexpensive materials
The zinc-air system, when sealed, has excellent shelf life, with a
self-discharge rate of only 2 percent per year.
In relation to their physical size, Zinc/Air batteries store more energy per
unit of weight (in terms of 220 Wh/kg) than almost any other primary type.
Primary cells available in a range of button and coin cell sizes.
Applications
The system is well known as a primary battery.
Zinc air button cells are commonly used for watches and hearing aids.
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