Quote Originally Posted by EchiDna View Post
Hi all,
I've got a battery in a non-LR which had a strange (to me) fault...

the battery still reads 12volts across the terminals, but will not turn over the car at all, so i replaced it...

I can still use the battery though for lesser tasks - seems like it lost a lot of it's current capacity.

The alternator (since replacing the battery) puts out 14.7volts when running, so no problem there....

any ideas?
is this common?
The problem here is failure of one of the internal cell connectors, causing the internal resistance of the battery to become way too high.

You will still measure 12V with a meter, which draws very little current, but when you put a proper load (eg. starter) across it, the battery cannot pass enough current.

Also, the connector problem will not allow the battery to be charged correctly.

Cheers,

Lionel