Charging Batteries from Batteries part 2. Free Energy?

[dandman]

Now I know what Im missing. how do I calculate the current amp holding of a battery. The only reference I have found to battery amperage holding is new at full charge divide the cca rating by 6.5 and that will give the as close you can get to the total ah available to dead.

[nightlife]

 I'm not sure. I have an automtive battery tester I use but it is not as accurate as I would like it to be.

[dandman]

Okaaay, mate it's been very informative. thanks for the interaction.
DOES ANYONE OUT THERE KNOW HOW TO CALCULATE THE CURRENT AMP HOUR HOLDING OF BATTERY AT ANY GIVEN POINT PLEASE?

[pese]

pls give details / data of you battery !

is this an car battery ??
example 84Ah 12volt = about 1 Kw/h  = 1 Kilowatt-hour
or
an array of AAA NiCad batteries at 1 Ah 

if you unload your battery with

30 AMP ! , for only 15 second

so ist this (to see the capacity (energy) per hour

ONLY 0.125  Ampere/hours  = 1/8 Ah.


SO ... IT is nothing unload  -in relation- to an strong battery !

So the battery will return to his (near) fully voltage after unloading 

Pese

[dandman]

Hi Pese, these are lead acid car batteries. the load test is deliberate to determine the condition of the battery. If the battery is charged above 12.64v hitting it at 5 percent of its cca rating in ah for 15 seconds at 80 degrees f. If in ok condition it should return to its original voltage if not it is deteriorating.