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What is the difference between primary and
secondary battery?
A primary battery can discharge once only,
while a second battery is rechargeable. When
discharge a rechargeable battery, its electrode
volume and structure cause a reversible change.
Therefore the design of a rechargeable battery
must be adequate to adjust these changes.
Since a primary battery internal structure
is more simple, it doesn¡¯t have to accommodate
reversible volume changes. The primary battery
has bigger quality ratio and volume ratio
than rechargeable battery, however it has
a far bigger impedance, consequently the load
capability is lower. Furthermore self-discharge
of a primary battery is far lower than secondary
one.
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