...different ways this could go wrong, leaving you high and dry without a car battery correctly re-installed!

Just look at the automotive robotic systems we have in place today - your typical car wash. Those things go on the blink all the time, are out of service for weeks. Plus it destroys your wing mirrors / car aerial / leaves scratch marks etc. Not to mention it failing to clean your car properly.

.

Just one little slip up, misalignment anywhere, part failure, too much torque applied somewhere, and you're left trying to lift a 60+ Kg battery pack back into your car on your own.

.

victim : "Help me, your bloody machine has de-threaded my battery mounting bolts!"

petrol station cashier : "Sorry mate, can't help - queue is too long."

victim : "I'll see you in court."

.

Plus I'm not sure I'd want my shiny new leccy car battery replaced with some 2 year old battery with a range of 10 miles cos its been used so much.