Quote:
Originally Posted by tinman01
I'm having a hard time wrapping my mind around the time frame they put on batteries. 75 amps for 2 hours how do they get 200 amps for 20 hours? Seems backwards. That seems to be on all the batteries, I just don't get how you can draw higher amps for longer times.
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It's not the time at the amp. The time is how long it takes to discharge a full battery. It is a 20 hour rate of current, a 2 hour rate of current. The AH capacity of most automotive batteries are calculated at the 20 hour rate as a standard. The faster you discharge a battery (higher current) the lower its actual capacity will be.