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Pastimes : Car Nut Corner: All About Cars
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To: SI Bob who wrote (1883)11/30/2007 1:40:43 PM
From: gg cox  Read Replies (2) of 5723
 
Bob, the experts on lead acid batteries say there are more round trip cycles in them, the less deep you draw them down.
In other words if you are only taking off the top 20 percent, you will get many more total round trips out of them, before they finally calf.That is the big drawback to lead acids.

If they are in a state of being kept at proper full charge 12.8 v to slightly over 13 v (depending on temperature)for 12 v system by a charge controller or regulator and then only taking off top 5 or ten percent at a time, they will of course, last much longer.

Going deep into them regularly to 7.7 volts (dead) would cut deeply into total cycles in them, so, not a good idea for longevity.
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