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If you think the battery is fully charged see if it can run the headlights.

If it does then turn the engine over and see if the headlights go off and fade back when you stop turning the engine. That would be a sure sign that the battery is 'dud'. If you can measure the voltage at the battery while turning the engine over. If it drops significantly below 10 volts I'd class it as deceased.

A charged lead acid battery should comfortably sit above 12.5 volts, ideally above 13.0 volts just after charging (with no load)
 

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Delighted you are mobile again, ‘mitchino’. This is a nice forum for help and guidance as there are many knowledgeable owners who are happy to offer their assistance with common and not so common problems.
 

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Agree totally. Even if that battery did start your car now, it's bound to fail at an inconvenient moment. Any taxi fare would be better spent on a replacement.
 
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