Testing AGM batteries?
When I got my last set of batteries (150aH AGM, used), they had been tested on a high-amp car tester. But my friend who knows batteries pretty well said that was not a proper test, that what we shoul...
Forum Discussion
GordonThree wrote:
Sounds like good advice from your friend.
WHAT ?? Most of his advice is dead wrong.....like the part about having to discharge them down to 11 volts for a test. The OP has already seen what that can do. And the part about cycling being better than a proper float during storage is just total bunk.
A "standard" load test will tell you about the basic health of an AGM battery......as measured by the same spec's as a conventional wet cell. Odds are extremely high that if it passes that test there is little or nothing wrong with it that would interfere with normal use.
Being obsessive about things like this often leads you to buy into obscure theories that often have no practical use.....even if they are technically "right".
P.S. Some conventional wet cells can pass a high current load test when they are on the verge of total failure too.
If the symptoms make you think they are about at the end of their useful life, then the odds are extremely high that they really ARE.
