On 23/03/2020 09:33, Chris Green wrote:
charles wrote:
In article ,
ss wrote:
Changed my car a couple of weeks back and it has the push button
start/stop rather than ignition key. It also cuts out if stopped at
traffic lights and restarts when accelerator pedal is pressed.

All very well for saving fuel and I am sure the answer will be yes, but
how much does this impact on the battery life with all the `extra`stop
starts, or has the technology improved so that this has no adverse
effect on battery life.

Most of our driving is around town.

The brochure for my car, which does the same, says the energy for
restarting comes from braking stored in a supercapacitor. Battery not
involved.

There's also a new 'breed' of batteries becoming available
specifically designed to handle this, I think they're actually called
'stop/start' batteries. Yes, a quick search for 'stop start battery'
brings up loads of hits.

IIRC it was Porsche who had this system first. We had a Polo nearly 30
years ago that had this system, just an ordinary battery, no issue with
battery life. We sold it to a friend's mum when we needed something
bigger, and bought it back ten or more years later as a second car when
they had to give up driving.