These are only batteries that I happen to have at home (Well I do have more bad batteries here, but I'm not really interested in testing obviously bad batteries except for what help it can lend on team visits).
I'll do more extensive variations when I get to the shop.
Quote:
Originally Posted by Mike Copioli
The first battery on the left, the one that measured as bad is discharged, Charge the battery and then perform the test again.
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Nope, that bad battery is as fully charged as it will go
It really is a bad battery. It came from the recycle pile.
Quote:
Originally Posted by Mike Copioli
The last battery that measured fair looks like it was just pulled off of the charger, you should let it rest for about 15 minutes to an hour to allow the surface charge to penetrate the plates.
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Understood, someone PMed a question about what it looked like if (incorrectly) tested with a surface charge, as in rapid pit battery changes with the batteries fresh off a charger.
Quote:
Originally Posted by Mike Copioli
You should see about a 10% decrease in the internal resistance after this.
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The middle and right are the same battery after 10 minutes on a charger.
.026 (no surface charge) to .029 (with a surface charge) is the 10% difference you mention.
I'm waiting for the surface charge to dissipate again now to see if the resistance drops and the Beak returns to a
Good rating.