How a Battery Works
Performance
EVER stop to think why in some
devices, batteries are lined up head to
tail while in others, they're placed side
by side? That's because power cells
perform differently depending on the
way they're connected. If they're lined
up in a series head to tail, like in a
flashlight, the voltage output increases.
When two 1.5 volt cells
are
connected in a series, the voltage
grows to 3. So, in other words, the
happy-go-lucky 9 volt battery is really
a series of six 1.5 volt cells!
Now when cells are lined up head to
tail, the voltage may grow, but the
capacity, or use life, remains the same
as that of a single cell in the series. To
increase the cell capacity, a parallel
connection is used. That means that
anode is connected to anode and
cathode to cathode. Two 1.5 volt
cells connected in parallel will
produce only 1.5 volts but their
capacity will double.
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