Join Date: Jun 2010
Location: Dunstable Bedfordshire
My Motorhome: Auto-Sleeper EK TB LP
Thanked 92 Times in 88 Posts
With my Mazda 3, sport no less, I have suffered from a flat fob battery a couple of times, better to buy a new battery rather than one from the back of a drawer.
With mine there is a retractable key in the fob to gain access to the car and being a push button start the fob is held next to the button or even use it to push in the button.
There is a chip in the fob that the push button can detect, same as the type in your credit/debit card.