Re charged flat 12V battery. now get error message

After recharging the 12v battery when I turn the key I get
Service Due - expected, then
STOP - switch off motor.
I suspect something needs resetting because the 12v power was lost,
Any ideas?

It shouldn’t do. I’ve replaced my 12v battery without issues. You get the same error when the voltage is two low. Could be faulty battery or loose connections.

I have changed the battery three times and never had any issues.

Check the voltage across the 12V battery when you try and start the engine, maybe you have a dead cell in the battery dropping the battery voltage below 12V when you try and start?

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