On Jul 26, 7:51 am, Electricky Dicky wrote:

Sorry Pete I cannot relate to the above, it is a far too simplistic.
Here in the UK and I feel also in the US battery capacity is normally
quoted at a 20hour rate.
Therefore in the example offered above - 1A for 10hrs giving a 25%
drop in "State of Charge" the actual original battery capacity would
have been more like 35AH given a Peukert of 1.25

Ok I realise that you used the term "about" but we are talking major %
differences here.

Very good point, to get a good comparison of actual to rated capacity
you'd need to discharge at a 20hr rate.

So for a 40Ah battery this would be 40(Ah)/20(hours) = 2 amps.

cheers,
Pete.