FOAK Car batteries
in [UK Motorcycles]
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From: steve auvache on 21 Mar 2010 14:11 In article <4mncq5pb8genq8bedrg6hflbto7e8pc0pd(a)4ax.com>, Ace <b.rogers(a)ifrance.com> writes >On Sun, 21 Mar 2010 17:40:18 +0000, steve auvache ><dont_spam(a)thecow.me.uk> wrote: > >>In article <98lcq5l93kpkig889odd5o7cqnmjd22m47(a)4ax.com>, Ace >><b.rogers(a)ifrance.com> writes >>>So the battery on J's Peugeot seems to be on the way out, >> >>>So clearly I'll need to get a new one, but was wondering if removing >>>some of the old fluid and topping up with unused battery acid would >>>extend its life, at least for a few days untuil I get a new one. Any >>>thoughts? >> >>It might or it might not depending on what is causing the old battery to >>misbehave. Worth doing if you happen to have a surplus of acid left >>over from dissolving the evidence anyway because it certainly won't be >>any worse after. > >Just checked, and the charging rate has dropped to ~1.7A. Is that a >sign that it's taking charge better now that when in the car? Probably not. To my charger a 2 or 3 day battery looks exactly the same as good one and will give all the right signals while charging. Put it where it needs to live and come Monday morning it is not working. If you suspect the charging system do the tests. -- steve auvache VN750 Third gear has scope. SR250 The SpazzTrakka (Improved).
From: Ace on 21 Mar 2010 14:24 On Sun, 21 Mar 2010 18:11:43 +0000, steve auvache <dont_spam(a)thecow.me.uk> wrote: >In article <4mncq5pb8genq8bedrg6hflbto7e8pc0pd(a)4ax.com>, Ace ><b.rogers(a)ifrance.com> writes >>Just checked, and the charging rate has dropped to ~1.7A. Is that a >>sign that it's taking charge better now that when in the car? > >Probably not. To my charger a 2 or 3 day battery looks exactly the same >as good one and will give all the right signals while charging. Put it >where it needs to live and come Monday morning it is not working. > >If you suspect the charging system do the tests. Err, well, it's a modern car with all the self-diagnostics that implies, but TBH I wouldn't have a clue how to test the charging system, other than by seeing the battery warning light come on.
From: sweller on 21 Mar 2010 14:33 Ace wrote: > >> So clearly I'll need to get a new one, but was wondering if removing > >> some of the old fluid and topping up with unused battery acid would > >> extend its life, at least for a few days untuil I get a new one. Any > >> thoughts? > > > > EDTA can help > > Wassat then? It's a chemical that when added to a battery has the effect of causing sulphation to drop off the plates. It's not that readily available and is really just putting off the inevitable. http://www.sweller.co.uk/mz/electrics/elc_edta.html I've got a bit of a stock of it and it's worked for me in the past but I don't use it so much now. - I'm sure it'd be pretty useless for you as your battery is likely to be sealed. -- Simon
From: steve auvache on 21 Mar 2010 14:30 In article <mvocq5hppigd69236uliie8i1ref14fsl3(a)4ax.com>, Ace <b.rogers(a)ifrance.com> writes >On Sun, 21 Mar 2010 18:11:43 +0000, steve auvache ><dont_spam(a)thecow.me.uk> wrote: > >>In article <4mncq5pb8genq8bedrg6hflbto7e8pc0pd(a)4ax.com>, Ace >><b.rogers(a)ifrance.com> writes > >>>Just checked, and the charging rate has dropped to ~1.7A. Is that a >>>sign that it's taking charge better now that when in the car? >> >>Probably not. To my charger a 2 or 3 day battery looks exactly the same >>as good one and will give all the right signals while charging. Put it >>where it needs to live and come Monday morning it is not working. >> >>If you suspect the charging system do the tests. > >Err, well, it's a modern car with all the self-diagnostics that >implies, but TBH I wouldn't have a clue how to test the charging >system, other than by seeing the battery warning light come on. Run engine at 30% revs, check if voltage across battery terminals is above 14V. That is 99% of it. -- steve auvache VN750 Third gear has scope. SR250 The SpazzTrakka (Improved).
From: Chris Bartram on 21 Mar 2010 14:36
On 21/03/2010 18:24, Ace wrote: > On Sun, 21 Mar 2010 18:11:43 +0000, steve auvache > <dont_spam(a)thecow.me.uk> wrote: > >> In article<4mncq5pb8genq8bedrg6hflbto7e8pc0pd(a)4ax.com>, Ace >> <b.rogers(a)ifrance.com> writes > >>> Just checked, and the charging rate has dropped to ~1.7A. Is that a >>> sign that it's taking charge better now that when in the car? >> >> Probably not. To my charger a 2 or 3 day battery looks exactly the same >> as good one and will give all the right signals while charging. Put it >> where it needs to live and come Monday morning it is not working. >> >> If you suspect the charging system do the tests. > > Err, well, it's a modern car with all the self-diagnostics that > implies, but TBH I wouldn't have a clue how to test the charging > system, other than by seeing the battery warning light come on. > Quick and dirty: chuck a voltmeter on the battery terminals, expect to see 12v or more. Turn on the headlights- it shoildn't drop too much. Turn the lights back off. Start the car and fast-idle it, expect to see 13.5V at least, probably a bit more. |