In article ,
Chris Jones wrote:

Would the workshop receive more money if they decide that the batteries
need replacing, even if the batteries are ok?

This.

It's also why some dealers advocate that, for best life on the Lead Acid
batteries, you should always run them fully down, before recharging
them.

Is it ignorance, or just a way to ensure you hammer the batteries
into the ground?

At which point they can sell you new ones at ridiculous markup,
as "specialist items" which can't be bought elsewhere ...
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Mike Brown: mjb[-at-]signal11.org.uk | http://www.signal11.org.uk

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