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Thread: Battery Capacity
face picon face BY : email (remove spam text)(Olin Lathrop)

Tomás Ó hÉilidhe wrote:
> People have said to me already that a battery's "capacity" depends on
> what current you're drawing from it, and that's why you can't put a
> concrete figure on it as simple as "This battery has 760 milliwatt
> hours".
> Is the reason that it depends on the current you're drawing from it to
> do solely with the internal resistance of the battery?

Think about it.  If a perfect battery with 0 internal resistance was rated
for 1AH and you put 10ohms in series with it, how many AH can the battery
and resistor deliver to the load?

Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products
(978) 742-9014.  Gold level PIC consultants since 2000.
<013e01c8dea0$a47984a0$0300a8c0@main> quoted-printable

See also: www.piclist.com/techref/power/batterys.htm?key=battery
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