Anyone changed a battery on a modern car? Professional mark up looks to
be about £50.

My VW passat is not liking the current cold weather.

There seem to be several possible gotchas beyond the old lost radio
code:-( A U Tube video demonstrated a temporary 12V connection via what
I took to be the vehicle USB connection.

I was thinking a spare 12V battery temporarily clipped to the battery
leads...
--
Tim Lamb

On 08/12/2022 12:52, Tim Lamb wrote:
> There seem to be several possible gotchas beyond the old lost radio
> code:-(  A U Tube video demonstrated a temporary 12V connection via what
> I took to be the vehicle USB connection.
>
> I was thinking a spare 12V battery temporarily clipped to the battery
> leads...

Modern cars seem to need to be 'told' they have a new battery.

On 08/12/2022 12:52, Tim Lamb wrote:
> Anyone changed a battery on a modern car? Professional mark up looks to
> be about £50.
>
> My VW passat is not liking the current cold weather.
>
> There seem to be several possible gotchas beyond the old lost radio
> code:-(  A U Tube video demonstrated a temporary 12V connection via what
> I took to be the vehicle USB connection.
>
> I was thinking a spare 12V battery temporarily clipped to the battery
> leads...

Do modern car radios still require a code?
In my current car the radio shares the same display and controls as many
of the other car functions. In my much older previous car the radio was
somewhat more integrated into the fascia and not so easily removed as a
standard universal brick type unit.

I'm not sure that there are any other major gotchas.
The cars engine management may lose some of your personal driving habits
but on cars I've owned it has been stated that the ECU re-learns them
within a short time of driving. The car may perform slightly differently
to what you are used to but only for a few miles.

--
mailto : news {at} admac {dot} myzen {dot} co {dot} uk

On 08/12/2022 12:52, Tim Lamb wrote:
> Anyone changed a battery on a modern car? Professional mark up looks to
> be about £50.
>
> My VW passat is not liking the current cold weather.
>
>
How modern?
I've always been wary recalling issues with less modern cars but have
had no bother more recently, I've not changed a battery in anything
younger than about 8 years though.

On 08/12/2022 13:14, alan_m wrote:
> On 08/12/2022 12:52, Tim Lamb wrote:
>> Anyone changed a battery on a modern car? Professional mark up looks
>> to be about £50.
>>
>> My VW passat is not liking the current cold weather.
>>
>> There seem to be several possible gotchas beyond the old lost radio
>> code:-(  A U Tube video demonstrated a temporary 12V connection via
>> what I took to be the vehicle USB connection.
>>
>> I was thinking a spare 12V battery temporarily clipped to the battery
>> leads...
>
>
> Do modern car radios still require a code?

Modern car radios aren't even a discrete device, they are part of the
computer that's embedded into the dashboard. Nothing to nick, so no code
required.

Last century I made a long double ender cigarette lighter plug lead, and
used that from a doner car to the 'patient' car. That was in the good
old days when the cigarette lighter sockets were not switched via the
ignition key. Those days have long gone.

In message <tmsoi0$sepp$1@dont-email.me>, R D S <rsandr@yahoo.com>
writes
>On 08/12/2022 12:52, Tim Lamb wrote:
>> Anyone changed a battery on a modern car? Professional mark up looks
>>to be about £50.
>> My VW passat is not liking the current cold weather.
>>
>How modern?
>I've always been wary recalling issues with less modern cars but have
>had no bother more recently, I've not changed a battery in anything
>younger than about 8 years though.

2012 but I think the design is 2009/10
>

--
Tim Lamb

In article <tmsn9h$rcri$8@dont-email.me>,
Harry Bloomfield Esq <a@harrym1byt.plus.com> wrote:
> On 08/12/2022 12:52, Tim Lamb wrote:
> > There seem to be several possible gotchas beyond the old lost radio
> > code:-( A U Tube video demonstrated a temporary 12V connection via what
> > I took to be the vehicle USB connection.
> >
> > I was thinking a spare 12V battery temporarily clipped to the battery
> > leads...

> Modern cars seem to need to be 'told' they have a new battery.

Depends on the make and model.

--
*ONE NICE THING ABOUT EGOTISTS: THEY DON'T TALK ABOUT OTHER PEOPLE.

Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound.

On Thu, 08 Dec 2022 13:26:54 +0000, Mark Carver wrote:

> Last century I made a long double ender cigarette lighter plug lead, and
> used that from a doner car to the 'patient' car. That was in the good
> old days when the cigarette lighter sockets were not switched via the
> ignition key. Those days have long gone.

Can still do it via the OBD-II

--
My posts are my copyright and if @diy_forums or Home Owners' Hub
wish to copy them they can pay me £1 a message.
Use the BIG mirror service in the UK: http://www.mirrorservice.org
*lightning surge protection* - a w_tom conductor

On 08/12/2022 13:24, R D S wrote:
> On 08/12/2022 12:52, Tim Lamb wrote:
>> Anyone changed a battery on a modern car? Professional mark up looks
>> to be about £50.
>>
>> My VW passat is not liking the current cold weather.
>>
>>
> How modern?
> I've always been wary recalling issues with less modern cars but have
> had no bother more recently, I've not changed a battery in anything
> younger than about 8 years though.
>
Nor me but I try to connect my slave battery to the starter motor feed
and earth on the engine to preserve codes as the clip is too easy to
dislodge if it is on the battery leads.

In message <5a53a470cedave@davenoise.co.uk>, "Dave Plowman (News)"
<dave@davenoise.co.uk> writes
>In article <tmsn9h$rcri$8@dont-email.me>,
> Harry Bloomfield Esq <a@harrym1byt.plus.com> wrote:
>> On 08/12/2022 12:52, Tim Lamb wrote:
>> > There seem to be several possible gotchas beyond the old lost radio
>> > code:-( A U Tube video demonstrated a temporary 12V connection via what
>> > I took to be the vehicle USB connection.
>> >
>> > I was thinking a spare 12V battery temporarily clipped to the battery
>> > leads...
>
>> Modern cars seem to need to be 'told' they have a new battery.
>
>Depends on the make and model.

I wonder if that only relates to start/stop functionality as you can use
a conventional battery and override the s/s function.
Battery charging characteristics are different.
>

--
Tim Lamb

In message <jvem9bFh0plU1@mid.individual.net>, ajh
<news@loampitsfarm.co.uk> writes
>On 08/12/2022 13:24, R D S wrote:
>> On 08/12/2022 12:52, Tim Lamb wrote:
>>> Anyone changed a battery on a modern car? Professional mark up looks
>>>to be about £50.
>>>
>>> My VW passat is not liking the current cold weather.
>>>
>>>
>> How modern?
>> I've always been wary recalling issues with less modern cars but have
>>had no bother more recently, I've not changed a battery in anything
>>younger than about 8 years though.
>>
>Nor me but I try to connect my slave battery to the starter motor feed
>and earth on the engine to preserve codes as the clip is too easy to
>dislodge if it is on the battery leads.

Good point. I was thinking of making something up rather than using jump
leads.

--
Tim Lamb

On 08/12/2022 13:02, Harry Bloomfield Esq wrote:
> On 08/12/2022 12:52, Tim Lamb wrote:
>> There seem to be several possible gotchas beyond the old lost radio
>> code:-(  A U Tube video demonstrated a temporary 12V connection via
>> what I took to be the vehicle USB connection.
>>
>> I was thinking a spare 12V battery temporarily clipped to the battery
>> leads...
>
> Modern cars seem to need to be 'told' they have a new battery.

When I changed the battery on my 59 plate astra petrol, it
didn't care at all. No details were lost, radio still
worked, etc.

Some cars are ok, some aren't. Google to see what other
people do.

making up a battery pack of a few alkaline batteries to
end up with 12V and connected to a cigarette lighter
plug might be all that is needed.

On 08/12/2022 13:26, Mark Carver wrote:
> On 08/12/2022 13:14, alan_m wrote:
>> On 08/12/2022 12:52, Tim Lamb wrote:
>>> Anyone changed a battery on a modern car? Professional mark up looks
>>> to be about £50.
>>>
>>> My VW passat is not liking the current cold weather.
>>>
>>> There seem to be several possible gotchas beyond the old lost radio
>>> code:-(  A U Tube video demonstrated a temporary 12V connection via
>>> what I took to be the vehicle USB connection.
>>>
>>> I was thinking a spare 12V battery temporarily clipped to the battery
>>> leads...
>>
>>
>> Do modern car radios still require a code?
>
> Modern car radios aren't even a discrete device, they are part of the
> computer that's embedded into the dashboard. Nothing to nick, so no code
> required.
>
> Last century I made a long double ender cigarette lighter plug lead, and
> used that from a doner car to the 'patient' car. That was in the good
> old days when the cigarette lighter sockets were not switched via the
> ignition key. Those days have long gone.

In that case, can't you leave the ignition switched on while you swap
the battery?
--
Cheers,
Roger

In message <jvfb39FkbmbU1@mid.individual.net>, Roger Mills
<mills37.fslife@gmail.com> writes
>On 08/12/2022 13:26, Mark Carver wrote:
>> On 08/12/2022 13:14, alan_m wrote:
>>> On 08/12/2022 12:52, Tim Lamb wrote:
>>>> Anyone changed a battery on a modern car? Professional mark up
>>>>looks to be about £50.
>>>>
>>>> My VW passat is not liking the current cold weather.
>>>>
>>>> There seem to be several possible gotchas beyond the old lost radio
>>>>code:-(  A U Tube video demonstrated a temporary 12V connection via
>>>>what I took to be the vehicle USB connection.
>>>>
>>>> I was thinking a spare 12V battery temporarily clipped to the
>>>>battery leads...
>>>
>>>
>>> Do modern car radios still require a code?
>> Modern car radios aren't even a discrete device, they are part of
>>the computer that's embedded into the dashboard. Nothing to nick, so
>>no code required.
>> Last century I made a long double ender cigarette lighter plug lead,
>>and used that from a doner car to the 'patient' car. That was in the
>>good old days when the cigarette lighter sockets were not switched
>>via the ignition key. Those days have long gone.
>
>
>In that case, can't you leave the ignition switched on while you swap
>the battery?
No cigarette lighter on this car.
I think I'll go with AJH and find some safe connection points to couple
in a spare battery.
Modern car electronics have gone way beyond my level of understanding.
Air bags, alarm, window position coding, auto door locks... long way on
from my 1935 Morris tourer!

--
Tim Lamb

On 08/12/2022 13:26, Mark Carver wrote:
> when the cigarette lighter sockets were not switched via the ignition
> key. Those days have long gone.

Nope. My previous (2010) and current (2018) car have unswitched
cigarette lighter sockets as well as switched ones.

On 08/12/2022 12:52, Tim Lamb wrote:
> Anyone changed a battery on a modern car?

My car needs a new battery coding to the car. This is to reset the
adaptive charging system which is designed to minimise the load on the
alternator and enable regenerative braking (ordinary diesel not a
hybrid). Also to know the true state of charge of the battery for the
start/stop system.

On 09/12/2022 09:29, Tim Lamb wrote:
> In message <jvfb39FkbmbU1@mid.individual.net>, Roger Mills
> <mills37.fslife@gmail.com> writes
>> On 08/12/2022 13:26, Mark Carver wrote:
>>> On 08/12/2022 13:14, alan_m wrote:
>>>> On 08/12/2022 12:52, Tim Lamb wrote:
>>>>> Anyone changed a battery on a modern car? Professional mark up
>>>>> looks  to be about £50.
>>>>>
>>>>> My VW passat is not liking the current cold weather.
>>>>>
>>>>> There seem to be several possible gotchas beyond the old lost radio
>>>>> code:-(  A U Tube video demonstrated a temporary 12V connection via
>>>>> what I took to be the vehicle USB connection.
>>>>>
>>>>> I was thinking a spare 12V battery temporarily clipped to the
>>>>> battery  leads...
>>>>
>>>>
>>>> Do modern car radios still require a code?
>>>  Modern car radios aren't even a discrete device, they are part of
>>> the  computer that's embedded into the dashboard. Nothing to nick, so
>>> no code  required.
>>>  Last century I made a long double ender cigarette lighter plug lead,
>>> and  used that from a doner car to the 'patient' car. That was in the
>>> good  old days when the cigarette lighter sockets were not switched
>>> via the  ignition key. Those days have long gone.
>>
>>
>> In that case, can't you leave the ignition switched on while you swap
>> the battery?
> No cigarette lighter on this car.

not even an "accessory socket" hidden away somewhere (including in the
boot)?

--
Robin
reply-to address is (intended to be) valid

On Thu, 8 Dec 2022 22:43:06 +0000
Andrew <Andrew97d-junk@mybtinternet.com> wrote:

> On 08/12/2022 13:02, Harry Bloomfield Esq wrote:
> > On 08/12/2022 12:52, Tim Lamb wrote:
> >> There seem to be several possible gotchas beyond the old lost
> >> radio code:-(  A U Tube video demonstrated a temporary 12V
> >> connection via what I took to be the vehicle USB connection.
> >>
> >> I was thinking a spare 12V battery temporarily clipped to the
> >> battery leads...
> >
> > Modern cars seem to need to be 'told' they have a new battery.
>
> When I changed the battery on my 59 plate astra petrol, it
> didn't care at all. No details were lost, radio still
> worked, etc.
>
> Some cars are ok, some aren't. Google to see what other
> people do.
>

I know someone who killed an old Peugeot (not all *that* old) by
changing the battery. It wouldn't start afterwards and needed a new
ECU, which was not economic. This wasn't a con, either, it was not
exactly a common occurrence, but not all that rare either.

I can't remember the model, just that it was a something-0-something.
There was a lot of stuff on the Net (found *after* the event, of
course) about how to disconnect the battery safely, which boiled down to
removing the ignition key, waiting a while, then disconnecting the
battery. But absolutely nothing electrical must happen after removing
the key i.e. the driver's door must be closed and the window must be
open to take the key out, and the bonnet already open. I can't remember
what phase the moon had to be in.

--
Joe

In message <95998d4b-b2f5-4e9f-1d9e-d02a86cc935c@outlook.com>, Robin
<rbw@outlook.com> writes
>>>>  Last century I made a long double ender cigarette lighter plug
>>>>lead, and  used that from a doner car to the 'patient' car. That
>>>>was in the good  old days when the cigarette lighter sockets were
>>>>not switched via the  ignition key. Those days have long gone.
>>>
>>>
>>> In that case, can't you leave the ignition switched on while you
>>>swap the battery?
>> No cigarette lighter on this car.
>
>not even an "accessory socket" hidden away somewhere (including in the
>boot)?

There are USB connectors in the glove compartment and in front of the
passenger seats. More faff than croc clip leads in the engine bay. At
least I understand how they work:-)

--
Tim Lamb

In message <tmv35s$14msd$1@dont-email.me>, mm0fmf <none@invalid.com>
writes
>On 08/12/2022 12:52, Tim Lamb wrote:
>> Anyone changed a battery on a modern car?
>
>My car needs a new battery coding to the car. This is to reset the
>adaptive charging system which is designed to minimise the load on the
>alternator and enable regenerative braking (ordinary diesel not a
>hybrid). Also to know the true state of charge of the battery for the
>start/stop system.

Hmm. This reads like techno speak for needing to pay money to your
vehicle supplier.
There are no electronics in car batteries.
The battery I have ordered is an equivalent of the one fitted and I
don't see any way the onboard computer will be able to tell it has been
changed.

--
Tim Lamb

On 09/12/2022 13:46, Joe wrote:
> On Thu, 8 Dec 2022 22:43:06 +0000
> Andrew <Andrew97d-junk@mybtinternet.com> wrote:
>
>> On 08/12/2022 13:02, Harry Bloomfield Esq wrote:
>>> On 08/12/2022 12:52, Tim Lamb wrote:
>>>> There seem to be several possible gotchas beyond the old lost
>>>> radio code:-(  A U Tube video demonstrated a temporary 12V
>>>> connection via what I took to be the vehicle USB connection.
>>>>
>>>> I was thinking a spare 12V battery temporarily clipped to the
>>>> battery leads...
>>>
>>> Modern cars seem to need to be 'told' they have a new battery.
>>
>> When I changed the battery on my 59 plate astra petrol, it
>> didn't care at all. No details were lost, radio still
>> worked, etc.
>>
>> Some cars are ok, some aren't. Google to see what other
>> people do.
>>
>
> I know someone who killed an old Peugeot (not all *that* old) by
> changing the battery. It wouldn't start afterwards and needed a new
> ECU, which was not economic. This wasn't a con, either, it was not
> exactly a common occurrence, but not all that rare either.

More likely to be caused by cack-handed jump starting, or towing.

On 09/12/2022 14:25, Tim Lamb wrote:
> In message <95998d4b-b2f5-4e9f-1d9e-d02a86cc935c@outlook.com>, Robin
> <rbw@outlook.com> writes
>>>>>  Last century I made a long double ender cigarette lighter plug
>>>>> lead,  and  used that from a doner car to the 'patient' car. That
>>>>> was in the  good  old days when the cigarette lighter sockets were
>>>>> not switched  via the  ignition key. Those days have long gone.
>>>>
>>>>
>>>> In that case, can't you leave the ignition switched on while you
>>>> swap  the battery?
>>> No cigarette lighter on this car.
>>
>> not even an "accessory socket" hidden away somewhere (including in the
>> boot)?
>
> There are USB connectors in the glove compartment and in front of the
> passenger seats. More faff than croc clip leads in the engine bay. At
> least I understand how they work:-)
>

Run-flat tyres? Or do VW think Passat owners are too posh to use
plug-in 12V compressors to pump their own tyres?

--
Robin
reply-to address is (intended to be) valid

In message <aa763a78-6724-77b6-c7e7-109891d50bf0@outlook.com>, Robin
<rbw@outlook.com> writes
>On 09/12/2022 14:25, Tim Lamb wrote:
>> In message <95998d4b-b2f5-4e9f-1d9e-d02a86cc935c@outlook.com>, Robin
>><rbw@outlook.com> writes
>>>>>>  Last century I made a long double ender cigarette lighter plug
>>>>>>lead,  and  used that from a doner car to the 'patient' car. That
>>>>>>was in the  good  old days when the cigarette lighter sockets were
>>>>>>not switched  via the  ignition key. Those days have long gone.
>>>>>
>>>>>
>>>>> In that case, can't you leave the ignition switched on while you
>>>>>swap  the battery?
>>>> No cigarette lighter on this car.
>>>
>>> not even an "accessory socket" hidden away somewhere (including in
>>>the boot)?
>> There are USB connectors in the glove compartment and in front of
>>the passenger seats. More faff than croc clip leads in the engine
>>bay. At least I understand how they work:-)
>>
>
>Run-flat tyres? Or do VW think Passat owners are too posh to use
>plug-in 12V compressors to pump their own tyres?

They have supplied a jack and a spare wheel.
>

--
Tim Lamb

On 09/12/2022 14:33, Tim Lamb wrote:
> The battery I have ordered is an equivalent of the one fitted and I don't see any way the onboard computer will be able to tell it has been changed.

I didn't say there was in yours. There is a bloody great chunk of
electronics and software to do with working out the varying amounts of
charge needed to get the battery to 100 or 80% charge in my car. It
monitors how much was needed over time and knows how old the battery it
so it can charge the battery more as it ages. This info is reset when
you swap the battery and re-code it. If you swap an old battery with a
new one and don't re-code then it will be overcharged and reduce the
life. And yes it's a pain to have to do this.

Of course you know better even though you don't work with major EU car
manufacturers on their in-car computers and ECUS like I do. Anyway, you
can't even find the 12V accessory socket in your car. The cabin one may
be switched with the ignition though this can be changed on many VWs by
moving the fuse to a different slot in the box. The accessory socket in
the boot is normally unswitched.

On 09/12/2022 18:37, mm0fmf wrote:
> On 09/12/2022 14:33, Tim Lamb wrote:
>> The battery I have ordered is an equivalent of the one fitted and I
>> don't see any way the onboard computer will be able to tell it has
>> been changed.
>
> I didn't say there was in yours. There is a bloody great chunk of
> electronics and software to do with working out the varying amounts of
> charge needed to get the battery to 100 or 80% charge in my car. It
> monitors how much was needed over time and knows how old the battery it
> so it can charge the battery more as it ages. This info is reset when
> you swap the battery and re-code it. If you swap an old battery with a
> new one and don't re-code then it will be overcharged and reduce the
> life. And yes it's a pain to have to do this.

Ok, I'm going to bite here. You were doing well up to now.

Please define overcharged. It's pretty much impossible to overcharge a
lead acid battery. %age charge is dictated by voltage and time.

> Of course you know better even though you don't work with major EU car
> manufacturers on their in-car computers and ECUS like I do.

I'm not convinced you do. If you believe a car built with ESM will
inherently overcharge a low capacity battery, then you're simply wrong.

> Anyway, you
> can't even find the 12V accessory socket in your car. The cabin one may
> be switched with the ignition though this can be changed on many VWs by
> moving the fuse to a different slot in the box.

Some Fords too.

> The accessory socket in the boot is normally unswitched.