Should have bought a diesel

. Beefy batteries.
Sounds like something is still running on the car when the ignition is off, something more than usual or the alternator. Did you do that one at school with your fingers about generators and motors ?. I'd do that one to the technician. Faraday's law... coming back now

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New cars seem to have battery issues. Stop start doesn't
help. Hybrids don't do the mileage often on the engine running to charge the starter battery. Common issue with people doing the school run or station run. Anyhow not that one since it's not a Hybrids.
The other moan with new cars is you can't change the battery yourself without taking the car apart. Trusts yours isn't like that.