Balmar smart gauge and 10 hour AH testing

BFL13 wrote:
"If a test on a 100 amp hour battery reveals an actual 41 amp hours extracted to 50% SOC appear, what would you think?"

I'd think the actual capacity is 82 AH and not the 100 AH as rated "as new", IF the 41 came out at the 20hr rate of 5 amps--you should have hit the 50% mark at 8 hours into the test, approx.

I have done many of these 10 hour tests on my batteries over the years and can track how they lose AH as they get older and used more.

While camping I do a sort of discharge test every day, by comparing the AH down on the Trimetric with the "nearly resting" voltage and can see if the voltage "matches" the AH count. I don't do it by SG while camping, but I do get that cross-check to see if it is about right.

All this 10 hr test does is the same thing only in detail and uses SG too.