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Thread: Battery AH question
www.piclist.com/techref/power/batterys.htm?key=battery
picon face BY : Alan Beeber email (remove spam text)



I'll help with the AHr question, but I'll let others
establish why you need to re-think this problem.

AHr is simply Amps (current) divided by time (one hour).
This describes the capacity of the battery. For instance, a
10 AHr battery should be able to 10 amps of current to a
load for 1 hour. You should be able to get larger currents
for shorter periods of time.

However....

As the current from the battery increases, the battery
voltage goes down, potentially down to zero. This makes it
difficult to run DC-AC inverters, etc., from a small
battery, and can cause damage. A larger battery can hold the
voltage up for a longer period of time.


John Pearson wrote:
{Quote hidden}

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