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[Marks DTM Calib]

The modern cars have coulomb counting to get an estimate of battery charge capacity, if you go directly to the terminals, it confuses the system (it bypasses the current monitoring) and then you get a whole host of weirdness

[Andy B]

The modern cars have coulomb counting to get an estimate of battery charge capacity, if you go directly to the terminals, it confuses the system (it bypasses the current monitoring) and then you get a whole host of weirdness

No wonder you can't (easily) work on new cars ... 

[Doctor Gollum]

Newer X5s blow the board in the rear SAM if you jump the battery

[Lizzie Zoom]

This thread reminds me that I have to ask about the latest cars, like my daughter Grandland X, that has the function whereby the engine turns off if the car stops when still driving but halted by lights, traffic, etc.

In my day we were taught that every time you started the engine of a car, it took 15-20 minutes for the battery to have the power drained replaced.

.....

It's called stop/start .... & there's a button somewhere to turn it off, but unfortunately you have to press to disable each & every time you get in the car.

With these modern cars why are flat batteries not happening everywhere, especially in the big cities with stop and go traffic?

They fit two batteries 
Seriously, they fit AGM batteries which cost an arm & a leg

Ah, thanks Andy

[Lizzie Zoom]

This thread reminds me that I have to ask about the latest cars, like my daughter Grandland X, that has the function whereby the engine turns off if the car stops when still driving but halted by lights, traffic, etc.

In my day we were taught that every time you started the engine of a car, it took 15-20 minutes for the battery to have the power drained replaced.

.....

It's called stop/start .... & there's a button somewhere to turn it off, but unfortunately you have to press to disable each & every time you get in the car.

With these modern cars why are flat batteries not happening everywhere, especially in the big cities with stop and go traffic?

They fit two batteries 
Seriously, they fit AGM batteries which cost an arm & a leg

Usually between £3-400.

What!  Bloody hell!

Just imagine being an owner of one of those cars in the future when the batteries fail.  I moan about paying £70+ for replacements. 

[Field Marshal Dr. Opti]

I always disable the stop/start facility on the Indian.

Used it for a month to see if it made any difference to MPG. Nope....SFA.

Gimmick.

[Andy B]

I always disable the stop/start facility on the Indian.

Used it for a month to see if it made any difference to MPG. Nope....SFA.

Gimmick.

stop/start is more to do with reducing emissions 

[Field Marshal Dr. Opti]

I always disable the stop/start facility on the Indian.

Used it for a month to see if it made any difference to MPG. Nope....SFA.

Gimmick.

stop/start is more to do with reducing emissions 

Yes, Mr Beanz. But many people think they will get an extra 10 MPG while saving the planet.

[STEMO]

I always disable the stop/start facility on the Indian.

Used it for a month to see if it made any difference to MPG. Nope....SFA.

Gimmick.

stop/start is more to do with reducing emissions 

Yes, Mr Beanz. But many people think they will get an extra 10 MPG while saving the planet.

There's a very easy way to increase mpg........diesel 

[Field Marshal Dr. Opti]

I always disable the stop/start facility on the Indian.

Used it for a month to see if it made any difference to MPG. Nope....SFA.

Gimmick.

stop/start is more to do with reducing emissions 

Yes, Mr Beanz. But many people think they will get an extra 10 MPG while saving the planet.

There's a very easy way to increase mpg........diesel 

Don't start.

[Andy B]

I always disable the stop/start facility on the Indian.

Used it for a month to see if it made any difference to MPG. Nope....SFA.

Gimmick.

stop/start is more to do with reducing emissions 

Yes, Mr Beanz. But many people think they will get an extra 10 MPG while saving the planet.

There's a very easy way to increase mpg........diesel 

You've not driven my Merc then ..... 

[Andy B]

I always disable the stop/start facility on the Indian.

Used it for a month to see if it made any difference to MPG. Nope....SFA.

Gimmick.

stop/start is more to do with reducing emissions 

Yes, Mr Beanz. But many people think they will get an extra 10 MPG while saving the planet.

I disable my stop/start each time too .... 

[Field Marshal Dr. Opti]

I always disable the stop/start facility on the Indian.

Used it for a month to see if it made any difference to MPG. Nope....SFA.

Gimmick.

stop/start is more to do with reducing emissions 

Yes, Mr Beanz. But many people think they will get an extra 10 MPG while saving the planet.

There's a very easy way to increase mpg........diesel 

Tunnie was always banging on about 70 MPG and more from his derv Passat.

What does the brown  Merc van manage?

[Doctor Gollum]

I always disable the stop/start facility on the Indian.

Used it for a month to see if it made any difference to MPG. Nope....SFA.

Gimmick.

stop/start is more to do with reducing emissions 

Yes, Mr Beanz. But many people think they will get an extra 10 MPG while saving the planet.

There's a very easy way to increase mpg........diesel 

Tunnie was always banging on about 70 MPG and more from his derv Passat.

What does the brown  Merc van manage?

Probably 5 mpg less than the silver Merc Mumsybus...

As for Tunnie, it is commonly acknowledged that he can't drive... as bourne out by his ongoing car choices

[STEMO]

I always disable the stop/start facility on the Indian.

Used it for a month to see if it made any difference to MPG. Nope....SFA.

Gimmick.

stop/start is more to do with reducing emissions 

Yes, Mr Beanz. But many people think they will get an extra 10 MPG while saving the planet.

There's a very easy way to increase mpg........diesel 

Tunnie was always banging on about 70 MPG and more from his derv Passat.

What does the brown  Merc van manage?

Probably 5 mpg less than the silver Merc Mumsybus...

As for Tunnie, it is commonly acknowledged that he can't drive... as bourne out by his ongoing car choices

What you driving at the moment, Al?