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Post Subject:

In-situ battery charging

Reply from: paul c
Date: 02 Mar 2008, 20:04
Re: In-situ battery charging

paul c wrote:
> LJ wrote:
> ...
>> Did you ask your friend why he thought BMW includes an adaptor for the
>> accessory port with their battery tender if they intended to have you
>> disconnect the battery before using it?
>
>
> (pc blah blah snipped)


Forgot to mention that my own guess as to why they might have such an
adaptor would be for convenience, easier to reach perhaps, nothing
dangling perhaps or perhaps less chance of riding off without
disconnecting the charger!

Reply from: Rob Kleinschmidt
Date: 03 Mar 2008, 19:50
Re: In-situ battery charging

On Mar 2, 11:04 am, paul c <toledoby...@ac.ooyah> wrote:
> paul c wrote:
> > LJ wrote:
> > ...
> >> Did you ask your friend why he thought BMW includes an adaptor for the
> >> accessory port with their battery tender if they intended to have you
> >> disconnect the battery before using it?
>
> Forgot to mention that my own guess as to why they might have such an
> adaptor would be for convenience, easier to reach perhaps, nothing
> dangling perhaps or perhaps less chance of riding off without
> disconnecting the charger!

His point being that if the battery was disconnected, it'd be really
hard to get the charge current from the adapter port to the battery
if the battery wires weren't connected.

Make sense ?


Reply from: paul c
Date: 03 Mar 2008, 23:11
Re: In-situ battery charging

Rob Kleinschmidt wrote:
> On Mar 2, 11:04 am, paul c <toledoby...@ac.ooyah> wrote:
>> paul c wrote:
>>> LJ wrote:
>>> ...
>>>> Did you ask your friend why he thought BMW includes an adaptor for the
>>>> accessory port with their battery tender if they intended to have you
>>>> disconnect the battery before using it?
>> Forgot to mention that my own guess as to why they might have such an
>> adaptor would be for convenience, easier to reach perhaps, nothing
>> dangling perhaps or perhaps less chance of riding off without
>> disconnecting the charger!
>
> His point being that if the battery was disconnected, it'd be really
> hard to get the charge current from the adapter port to the battery
> if the battery wires weren't connected.
>
> Make sense ?
>

It makes sense to me just as I think it would to most people I know even
if that may not be true in your circles. Seems to me I answered LJ's
question directly in a different post even though one could take it as
rhetorical. BMW in general does lots of things that will elude the even
the most sensible person, like put hydraulic clutches in their car
cooling fans which cost as much to replace as the drivetrain clutch in a
Honda car.


Regarding the adapter, no matter how unusual the factory BMW charger
might be and admittedly without having a wiring diagram to look at, I
would presume that it is wired directly to the battery without any other
components, neither in series nor in parallel, save perhaps an inline
fuse. If there were other components, they might well be harmed by
charging voltages of 14V or more. So without further information I'd
have to stand by my guess that the adapter is there for convenience.


Thanks to the other posters for their comments. Friend's attitude may
well be f-witted on this topic but that's not true of him in general.
In this case it is a little strange to me since he knows a lot about jet
engines, air frames and avionics - for years his was the final signature
required before the giant passenger planes left the hangar shop.

Reply from: Rob Kleinschmidt
Date: 03 Mar 2008, 23:31
Re: In-situ battery charging

On Mar 3, 2:11 pm, paul c <toledoby...@ac.ooyah> wrote:
> Rob Kleinschmidt wrote:

> > His point being that if the battery was disconnected, it'd be really
> > hard to get the charge current from the adapter port to the battery
> > if the battery wires weren't connected.
>
> > Make sense ?
>
> It makes sense to me just as I think it would to most people I know even
> if that may not be true in your circles. Seems to me I answered LJ's
> question directly in a different post even though one could take it as
> rhetorical.

> Regarding the adapter, no matter how unusual the factory BMW charger
> might be and admittedly without having a wiring diagram to look at, I
> would presume that it is wired directly to the battery without any other
> components, neither in series nor in parallel, save perhaps an inline
> fuse. If there were other components, they might well be harmed by
> charging voltages of 14V or more. So without further information I'd
> have to stand by my guess that the adapter is there for convenience.

You can stand by anything you want to.
I think I'm now prepared to go with the f*witted assesment.

Reply from: .p.jm@see_my_sig_for_address,com
Date: 03 Mar 2008, 23:46
Re: In-situ battery charging

On Mon, 03 Mar 2008 22:11:12 GMT, paul c <toledobysea@ac.ooyah> wrote:

>Rob Kleinschmidt wrote:
>> On Mar 2, 11:04 am, paul c <toledoby...@ac.ooyah> wrote:
>>> paul c wrote:
>>>> LJ wrote:
>>>> ...
>>>>> Did you ask your friend why he thought BMW includes an adaptor for the
>>>>> accessory port with their battery tender if they intended to have you
>>>>> disconnect the battery before using it?
>>> Forgot to mention that my own guess as to why they might have such an
>>> adaptor would be for convenience, easier to reach perhaps, nothing
>>> dangling perhaps or perhaps less chance of riding off without
>>> disconnecting the charger!
>>
>> His point being that if the battery was disconnected, it'd be really
>> hard to get the charge current from the adapter port to the battery
>> if the battery wires weren't connected.
>>
>> Make sense ?
>>
>
>It makes sense to me just as I think it would to most people I know even
>if that may not be true in your circles. Seems to me I answered LJ's
>question directly in a different post even though one could take it as
>rhetorical. BMW in general does lots of things that will elude the even
>the most sensible person, like put hydraulic clutches in their car
>cooling fans which cost as much to replace as the drivetrain clutch in a
>Honda car.
>
>
>Regarding the adapter, no matter how unusual the factory BMW charger
>might be and admittedly without having a wiring diagram to look at, I
>would presume that it is wired directly to the battery without any other
>components, neither in series nor in parallel, save perhaps an inline
>fuse. If there were other components, they might well be harmed by
>charging voltages of 14V or more. So without further information I'd

And you figure the regulator puts out WHAT, exactly ?

You need to go find the battery FAQ online and read it.

>have to stand by my guess that the adapter is there for convenience.


>
>
>Thanks to the other posters for their comments. Friend's attitude may
>well be f-witted on this topic but that's not true of him in general.
>In this case it is a little strange to me since he knows a lot about jet
>engines, air frames and avionics - for years his was the final signature
>required before the giant passenger planes left the hangar shop.

--
Click here every day to feed an animal that needs you today !!!
http :// www .theanimalrescuesite,com /

Paul ( pjm @ pobox . com ) - remove spaces to email me
'Some days, it's just not worth chewing through the restraints.'
'With sufficient thrust, pigs fly just fine.'
HVAC/R program for Palm PDA's
Free demo now available online http :// pmilligan,net /palm/

Reply from: The Older Gentleman
Date: 03 Mar 2008, 23:54
Re: In-situ battery charging

paul c <toledobysea@ac.ooyah> wrote:

> Friend's attitude may
> well be f-witted on this topic but that's not true of him in general.
> In this case it is a little strange to me since he knows a lot about jet
> engines, air frames and avionics - for years his was the final signature
> required before the giant passenger planes left the hangar shop.

And these relate to motorcycles how????

I've lost count of the number of bikes I've seen buggered up by someone
"who knows all about cars".

Bikes are a law unto themselves, really.


--
BMW K1100LT Ducati 750SS Honda CB400F & SL125
GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 ANORAK#06 YTC#3
BOF#30 WUSS#5 The bells, the bells.....
chateau dot murray at idnet dot com

Reply from: .p.jm@see_my_sig_for_address,com
Date: 04 Mar 2008, 00:14
Re: In-situ battery charging

On Mon, 3 Mar 2008 22:54:29 +0000, totallydeadmailbox@yahoo.co.uk (The
Older Gentleman) wrote:

>paul c <toledobysea@ac.ooyah> wrote:
>
>> Friend's attitude may
>> well be f-witted on this topic but that's not true of him in general.
>> In this case it is a little strange to me since he knows a lot about jet
>> engines, air frames and avionics - for years his was the final signature
>> required before the giant passenger planes left the hangar shop.

This is usually the suit who counts the other signatures, and
hasn't picked up a tool in 20 years.

>
>And these relate to motorcycles how????
>
>I've lost count of the number of bikes I've seen buggered up by someone
>"who knows all about cars".
>
>Bikes are a law unto themselves, really.

--
Click here every day to feed an animal that needs you today !!!
http :// www .theanimalrescuesite,com /

Paul ( pjm @ pobox . com ) - remove spaces to email me
'Some days, it's just not worth chewing through the restraints.'
'With sufficient thrust, pigs fly just fine.'
HVAC/R program for Palm PDA's
Free demo now available online http :// pmilligan,net /palm/

Reply from: LJ
Date: 04 Mar 2008, 04:52
Re: In-situ battery charging


"paul c" <toledobysea@ac.ooyah> wrote in message
news:4I_yj.38877$pM4.16279@pd7urf1no...
> Rob Kleinschmidt wrote:
>> On Mar 2, 11:04 am, paul c <toledoby...@ac.ooyah> wrote:
>>> paul c wrote:
>>>> LJ wrote:
>>>> ...
>>>>> Did you ask your friend why he thought BMW includes an adaptor for the
>>>>> accessory port with their battery tender if they intended to have you
>>>>> disconnect the battery before using it?
>>> Forgot to mention that my own guess as to why they might have such an
>>> adaptor would be for convenience, easier to reach perhaps, nothing
>>> dangling perhaps or perhaps less chance of riding off without
>>> disconnecting the charger!
>>
>> His point being that if the battery was disconnected, it'd be really
>> hard to get the charge current from the adapter port to the battery
>> if the battery wires weren't connected.
>>
>> Make sense ?
>>
>
> It makes sense to me just as I think it would to most people I know even
> if that may not be true in your circles. Seems to me I answered LJ's
> question directly in a different post even though one could take it as
> rhetorical. BMW in general does lots of things that will elude the even
> the most sensible person, like put hydraulic clutches in their car cooling
> fans which cost as much to replace as the drivetrain clutch in a Honda
> car.
>
>
> Regarding the adapter, no matter how unusual the factory BMW charger might
> be and admittedly without having a wiring diagram to look at, I would
> presume that it is wired directly to the battery without any other
> components, neither in series nor in parallel, save perhaps an inline
> fuse. If there were other components, they might well be harmed by
> charging voltages of 14V or more. So without further information I'd have
> to stand by my guess that the adapter is there for convenience.
>
>
That all sounds pretty complicated to me. I just plug the $29 (deltran)
battery tender into the accessory port with the $6 adapter and then plug it
into the wall once a month or so in the winter. A few hours later the green
light comes on and I unplug it.



Reply from: paul c
Date: 04 Mar 2008, 06:15
Re: In-situ battery charging

LJ wrote:
...
> That all sounds pretty complicated to me. I just plug the $29 (deltran)
> battery tender into the accessory port with the $6 adapter and then plug it
> into the wall once a month or so in the winter. A few hours later the green
> light comes on and I unplug it.
>
>

Fine, I thought there were experts here.

Reply from: LJ
Date: 05 Mar 2008, 05:01
Re: In-situ battery charging


"paul c" <toledobysea@ac.ooyah> wrote in message
news:1W4zj.40521$pM4.2948@pd7urf1no...
> LJ wrote:
> ...
>> That all sounds pretty complicated to me. I just plug the $29 (deltran)
>> battery tender into the accessory port with the $6 adapter and then plug
>> it into the wall once a month or so in the winter. A few hours later the
>> green light comes on and I unplug it.
>
> Fine, I thought there were experts here.

Maybe I was being a bit facetious. However, Deltran is the same company that
makes BMW's branded battery tenders. I made sure I bought the correct unit
for my application, I read the instructions and followed them, without
consulting a rocket scientist. All the good advice in the world wouldn't
keep my battery's charge up throughout the long winter.



Reply from: paul c
Date: 05 Mar 2008, 06:26
Re: In-situ battery charging

LJ wrote:
> "paul c" <toledobysea@ac.ooyah> wrote in message
> news:1W4zj.40521$pM4.2948@pd7urf1no...
>> LJ wrote:
>> ...
>>> That all sounds pretty complicated to me. I just plug the $29 (deltran)
>>> battery tender into the accessory port with the $6 adapter and then plug
>>> it into the wall once a month or so in the winter. A few hours later the
>>> green light comes on and I unplug it.
>> Fine, I thought there were experts here.
>
> Maybe I was being a bit facetious. However, Deltran is the same company that
> makes BMW's branded battery tenders. I made sure I bought the correct unit
> for my application, I read the instructions and followed them, without
> consulting a rocket scientist. All the good advice in the world wouldn't
> keep my battery's charge up throughout the long winter.
>
>


And maybe I was being a bit touchy. I'm not so rabid about buzzwords as
some people I know. It's just that while there have been some chemistry
discoveries in the last 120 years and to boot some subtleties of
electrical fabrication such as the transistor, electrical/electronic
theory remains rather stable compared to politics and social science not
to mention economic theory, while the basics that Ohm, Thevenin, et
cetera came up with remain unchallenged except for corporate word
inventions like the disguised newswitches in the BMW whatchamacallits.
(I certainly wasn't trying to say that the BMW engineers were wrong by
obeying their masters' orders to come up with something that would be
commercially unique and I admire the cleverness of it all even if I
often don't get the practical point). Still I wonder if a few months in
a refrigerator isn't just as life-preserving for an unused battery as
monthly charging in a semi-heated garage. Anyway, thanks for the comment.

Reply from: Just Me
Date: 05 Mar 2008, 16:37
Re: In-situ battery charging


"paul c" <toledobysea@ac.ooyah> wrote

> Still I wonder if a few months in a refrigerator isn't just as
> life-preserving for an unused battery as monthly charging in a semi-heated
> garage. Anyway, thanks for the comment.

Well, there experts and then there are EXPERTS.
You will find all kinds here; your mission is to be able pick out the "real"
ones. ;-)

As for the above question, the answer is maybe but probably not.

Cold is good for battery storage, as long as it is above the freezing point
of the electrolyte
BUT
It is much MORE important to keep it fully charged because the real enemy of
lead-acid batteries is SULPHATION. That occurs at a rate that is inversely
proportional to the level of charge.

It is impossible to stop sulphation completely and, as it gets worse, the
self-discharge rate creeps up so that the process is self-accelerating. A
brand new battery, fully charged will (likely) stay near enough to fully
charged that it will survive without any attention over 3-4 months of
storage. A "top off" before starting in the spring is advisable.

An older battery, however, already has some sulphation and thus a greater
tendency to self-discharge during storage. It requires periodic recharging
or a tender.

Regardless of your level of expertise, the best thing to do is attach a
tender because you don't have to figure how old the battery is or remember
to connect that charger every few weeks.

Enough information?
Other questions?



Reply from: MadDogR75@yahoo,com
Date: 06 Mar 2008, 04:57
Re: In-situ battery charging

On Mar 2, 10:45 am, paul c <toledoby...@ac.ooyah> wrote:
> I've been using a Ctek charger on some of my older scoots (250's and a
> 400), without disconnecting the battery cables. A friend with a newish
> BMW 1200 (beautiful bike) told me you can't do that on his bike without
> risking damage to several of the electronics, so he disconnects the
> battery before giving a maintenance charge. Brief searching hasn't yet
> given me a clue why this might be so. Can anybody here comment?

I have seen similar warnings for cars with computer systems,
but they seem to refer to the practice of jumping from another
battery,
and using a frame ground instead of conecting direct to the battery.
I suppose there is some possiblity of a damaging surge in that case,
particularly if you get the connection wrong or contact something you
shouldn't..
Oh for the good old days when you could see, fix, & understand the
working
of everything on your bike.!


Pg.
2



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