Forums

Charge gel cell with car charger?

Started by Mike Cook February 24, 2013
On Tue, 26 Feb 2013 21:43:13 -0000, "Ian Field"
<gangprobing.alien@ntlworld.com> wrote:

> > >"John Fields" <jfields@austininstruments.com> wrote in message >news:gh9qi8t3alcietnh2r674clj7ne976j2af@4ax.com... >> On Tue, 26 Feb 2013 16:46:14 -0000, "Ian Field" >> <gangprobing.alien@ntlworld.com> wrote: >> >>> >>> >>>"John Fields" <jfields@austininstruments.com> wrote in message >>>news:2dvni890e0mu6d56odaunfsqgu8ssjt7qm@4ax.com... >>>> On Mon, 25 Feb 2013 22:36:52 -0000, "Ian Field" >>>> <gangprobing.alien@ntlworld.com> wrote: >>>> >>>>> >>>>> >>>>>"Jan Panteltje" <pNaonStpealmtje@yahoo.com> wrote in message >>>>>news:kgcpgh$ipp$1@news.albasani.net... >>>>>> On a sunny day (Sun, 24 Feb 2013 00:06:18 -0800) it happened Mike Cook >>>>>> <mcham@NOTyahoo.com> wrote in >>>>>> <0001HW.CD4F09FA05B8251DB04179BF@news.eternal-september.org>: >>>>>> >>>>>>>A friend has a battery powered Ryobi lawn trimmer ("weed whacker") >>>>>>>which >>>>>>>doesn't work. The 12vdc wall wart puts out only ~ 12.4v. >>>>>>> >>>>>>>I charged the lead-acid gel cell using a car charger. The charge rate >>>>>>>(selectable) was 0.5A. Afterward the trimmer seemed to work as new. >>>>>>> >>>>>>>Can the car charger be used to charge this battery? He can install a >>>>>>>timer >>>>>>>to >>>>>>>limit charge time if that's something required. >>>>>>> >>>>>>>Thanks. >>>>>> >>>>>> Old trick was to put a car headlight or some other low voltage bulb >>>>>> (break >>>>>> light) >>>>>> in series as current limiter. >>>>>> Maybe modern car has only LEDs, dunno, :-) >>>>> >>>>> >>>>>Its a trick I often use if I have to, but increasingly I turn to the >>>>>more >>>>>modern electronic/microcontroller type chargers that automatically >>>>>switch >>>>>to >>>>>trickle charge. >>>> >>>> --- >>>> That's a good thing, since it puts you squarely into the rank of a >>>> "consumer", where you clearly belong, instead of into the ranks of >>>> designers, where you've clearly demonstrated you don't belong. >>>> >>>> I could be wrong of course, >>> >>>Indeed. >> >> --- >> But, more than likely not, since I requested that you elaborate with >> an explanation of your "tricks" > >No you didn't (the senility really is robbing your faculties!) The trick was >already described by someone else - I merely replied I do that too (and no - >I can't be bothered drawing pictures because you're too thick to >understand).
--- My request was about having you describe the dynamics of a light-bulb-in-series-with-a-battery current limiter which, no matter how loudly or how long you squeal excuses about why you can't, you can't, of course. Unlike you, I've done empirical work which has resulted in published plots of tungsten lamp filament resistances being functions of voltages across, and currents through the filament. I'll email you the plots, if you like. Your admission to being a copycat hardly qualifies you as an authority, and certainly explains why you "can't be bothered drawing pictures" of what you can't envision. ---
>You're not only wrong, but stumbling about in a state of advanced dementia.
--- Wow, with your super-quick response, you must really want me to notice you and have you suck my dick or have me fuck you up the ass... Sorry, Charlie... -- JF
"dave"
 Phil Allison wrote:
>> "dave" >>> >>>>> ** SLA or "gel cells" are prone to gassing when overcharged. >>>>>> >>>>>> The pressure builds up inside until something gives - then >>>>>> you have bits of battery and acid all over the place. >>>>>> >>>>>> Voltage & current limited charging is the only safe and >>>>>> sensible way. >>>>>> >>>>> >>>>> They have vents. >> >> >> ** Most do not - eg: >> >> http://cdn-products.austinkayak.com/p_8037_700.jpg >> >> An acquaintance had a 12V gell battery like the one pictured explode >> violently while doing just what the OP here is contemplating. He was >> sleeping nearby at the time an got one HELL of a scare !!!! >> >> Makers all warn against using unregulated ( ie raw, rectified AC ) >> chargers with gell or SLA batteries. >> > > they always include a safety pressure relief valve.
** Kindly point this out in the pic I posted - smartarse. The battery will simply blow apart if overcharged. ... Phil
John Fields wrote:

> On Tue, 26 Feb 2013 21:43:13 -0000, "Ian Field" > <gangprobing.alien@ntlworld.com> wrote: > > >> >>"John Fields" <jfields@austininstruments.com> wrote in message >>news:gh9qi8t3alcietnh2r674clj7ne976j2af@4ax.com... >> >>>On Tue, 26 Feb 2013 16:46:14 -0000, "Ian Field" >>><gangprobing.alien@ntlworld.com> wrote: >>> >>> >>>> >>>>"John Fields" <jfields@austininstruments.com> wrote in message >>>>news:2dvni890e0mu6d56odaunfsqgu8ssjt7qm@4ax.com... >>>> >>>>>On Mon, 25 Feb 2013 22:36:52 -0000, "Ian Field" >>>>><gangprobing.alien@ntlworld.com> wrote: >>>>> >>>>> >>>>>> >>>>>>"Jan Panteltje" <pNaonStpealmtje@yahoo.com> wrote in message >>>>>>news:kgcpgh$ipp$1@news.albasani.net... >>>>>> >>>>>>>On a sunny day (Sun, 24 Feb 2013 00:06:18 -0800) it happened Mike Cook >>>>>>><mcham@NOTyahoo.com> wrote in >>>>>>><0001HW.CD4F09FA05B8251DB04179BF@news.eternal-september.org>: >>>>>>> >>>>>>> >>>>>>>>A friend has a battery powered Ryobi lawn trimmer ("weed whacker") >>>>>>>>which >>>>>>>>doesn't work. The 12vdc wall wart puts out only ~ 12.4v. >>>>>>>> >>>>>>>>I charged the lead-acid gel cell using a car charger. The charge rate >>>>>>>>(selectable) was 0.5A. Afterward the trimmer seemed to work as new. >>>>>>>> >>>>>>>>Can the car charger be used to charge this battery? He can install a >>>>>>>>timer >>>>>>>>to >>>>>>>>limit charge time if that's something required. >>>>>>>> >>>>>>>>Thanks. >>>>>>> >>>>>>>Old trick was to put a car headlight or some other low voltage bulb >>>>>>>(break >>>>>>>light) >>>>>>>in series as current limiter. >>>>>>>Maybe modern car has only LEDs, dunno, :-) >>>>>> >>>>>> >>>>>>Its a trick I often use if I have to, but increasingly I turn to the >>>>>>more >>>>>>modern electronic/microcontroller type chargers that automatically >>>>>>switch >>>>>>to >>>>>>trickle charge. >>>>> >>>>>--- >>>>>That's a good thing, since it puts you squarely into the rank of a >>>>>"consumer", where you clearly belong, instead of into the ranks of >>>>>designers, where you've clearly demonstrated you don't belong. >>>>> >>>>>I could be wrong of course, >>>> >>>>Indeed. >>> >>>--- >>>But, more than likely not, since I requested that you elaborate with >>>an explanation of your "tricks" >> >>No you didn't (the senility really is robbing your faculties!) The trick was >>already described by someone else - I merely replied I do that too (and no - >>I can't be bothered drawing pictures because you're too thick to >>understand). > > > --- > My request was about having you describe the dynamics of a > light-bulb-in-series-with-a-battery current limiter which, no matter > how loudly or how long you squeal excuses about why you can't, you > can't, of course. > > Unlike you, I've done empirical work which has resulted in published > plots of tungsten lamp filament resistances being functions of > voltages across, and currents through the filament. > > I'll email you the plots, if you like. > > Your admission to being a copycat hardly qualifies you as an > authority, and certainly explains why you "can't be bothered drawing > pictures" of what you can't envision. > --- > > >>You're not only wrong, but stumbling about in a state of advanced dementia. > > > --- > Wow, with your super-quick response, you must really want me to notice > you and have you suck my dick or have me fuck you up the ass... > > Sorry, Charlie... >
One of your fetishes? Jamie
On Tue, 26 Feb 2013 07:59:25 -0800, dave <ricketzz@earthlink.net> wrote:

>On 02/26/2013 07:39 AM, SoothSayer wrote: >> On Tue, 26 Feb 2013 06:58:16 -0800, dave <ricketzz@earthlink.net> wrote: >> >>> A lot of mobile equipment will >>> not work properly on 12 Vdc. >> >> >> Stop lying. >> >> The devices designed for 13.6 v typically will operate within a supply >> source voltage window. >> >> 12 volts is far too close to 13.6 for any device I can think of having >> a problem. I think you are making shit up. >> > >http://forums.qrz.com/showthread.php?246634-ATX-Power-Supply-for-Ham-Radio
You're an idiot. Those are the supply OUTPUT voltages, not the input requisite. Which if you had any brains and took note, spans from 90 volts to 265 volts, which is also typical. The 'typical" thing you missed is that DC fed devices ALSO operate within a RANGE of voltage sources. sheesh.
On Tue, 26 Feb 2013 18:44:16 -0500, Jamie
<jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net> wrote:

>John Fields wrote:
>> Wow, with your super-quick response, you must really want me to notice >> you and have you suck my dick or have me fuck you up the ass... >> >> Sorry, Charlie... >> >One of your fetishes? > >Jamie
--- No, just conjecture, but it's interesting how, when the conversation turns lewd, you people are drawn to it like a moth to a flame. -- JF
> > So you know it all. Great! >
I specifically stated that I did not. You may be a good engineer but you are a shitty reader.
On 02/26/2013 03:25 PM, Phil Allison wrote:
> > "dave"
>> >> they always include a safety pressure relief valve. > > ** Kindly point this out in the pic I posted - smartarse. > > The battery will simply blow apart if overcharged.
Your photo only showed 3 sides of a six sided solid object. I do not have X-ray vision.

"John Fields" <jfields@austininstruments.com> wrote in message 
news:mcbqi8t00ur6s6sk6kmuskjtkpg28fegtm@4ax.com...
> On Tue, 26 Feb 2013 21:43:13 -0000, "Ian Field" > <gangprobing.alien@ntlworld.com> wrote: > >> >> >>"John Fields" <jfields@austininstruments.com> wrote in message >>news:gh9qi8t3alcietnh2r674clj7ne976j2af@4ax.com... >>> On Tue, 26 Feb 2013 16:46:14 -0000, "Ian Field" >>> <gangprobing.alien@ntlworld.com> wrote: >>> >>>> >>>> >>>>"John Fields" <jfields@austininstruments.com> wrote in message >>>>news:2dvni890e0mu6d56odaunfsqgu8ssjt7qm@4ax.com... >>>>> On Mon, 25 Feb 2013 22:36:52 -0000, "Ian Field" >>>>> <gangprobing.alien@ntlworld.com> wrote: >>>>> >>>>>> >>>>>> >>>>>>"Jan Panteltje" <pNaonStpealmtje@yahoo.com> wrote in message >>>>>>news:kgcpgh$ipp$1@news.albasani.net... >>>>>>> On a sunny day (Sun, 24 Feb 2013 00:06:18 -0800) it happened Mike >>>>>>> Cook >>>>>>> <mcham@NOTyahoo.com> wrote in >>>>>>> <0001HW.CD4F09FA05B8251DB04179BF@news.eternal-september.org>: >>>>>>> >>>>>>>>A friend has a battery powered Ryobi lawn trimmer ("weed whacker") >>>>>>>>which >>>>>>>>doesn't work. The 12vdc wall wart puts out only ~ 12.4v. >>>>>>>> >>>>>>>>I charged the lead-acid gel cell using a car charger. The charge >>>>>>>>rate >>>>>>>>(selectable) was 0.5A. Afterward the trimmer seemed to work as new. >>>>>>>> >>>>>>>>Can the car charger be used to charge this battery? He can install a >>>>>>>>timer >>>>>>>>to >>>>>>>>limit charge time if that's something required. >>>>>>>> >>>>>>>>Thanks. >>>>>>> >>>>>>> Old trick was to put a car headlight or some other low voltage bulb >>>>>>> (break >>>>>>> light) >>>>>>> in series as current limiter. >>>>>>> Maybe modern car has only LEDs, dunno, :-) >>>>>> >>>>>> >>>>>>Its a trick I often use if I have to, but increasingly I turn to the >>>>>>more >>>>>>modern electronic/microcontroller type chargers that automatically >>>>>>switch >>>>>>to >>>>>>trickle charge. >>>>> >>>>> --- >>>>> That's a good thing, since it puts you squarely into the rank of a >>>>> "consumer", where you clearly belong, instead of into the ranks of >>>>> designers, where you've clearly demonstrated you don't belong. >>>>> >>>>> I could be wrong of course, >>>> >>>>Indeed. >>> >>> --- >>> But, more than likely not, since I requested that you elaborate with >>> an explanation of your "tricks" >> >>No you didn't (the senility really is robbing your faculties!) The trick >>was >>already described by someone else - I merely replied I do that too (and >>no - >>I can't be bothered drawing pictures because you're too thick to >>understand). > > --- > My request was about having you describe the dynamics of a > light-bulb-in-series-with-a-battery current limiter which, no matter > how loudly or how long you squeal excuses about why you can't, you > can't, of course.
The bulb trick isn't that great because of its pronounced PTC characteristic - as the filament voltage decreases the current doesn't decrease in due proportion. I did try to dumb it down for you - I do hope I didn't use too many big words for you!

"Jamie" <jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net> wrote in message 
news:CDbXs.151910$uU.43410@newsfe11.iad...
> John Fields wrote: > >> On Tue, 26 Feb 2013 21:43:13 -0000, "Ian Field" >> <gangprobing.alien@ntlworld.com> wrote: >> >> >>> >>>"John Fields" <jfields@austininstruments.com> wrote in message >>>news:gh9qi8t3alcietnh2r674clj7ne976j2af@4ax.com... >>> >>>>On Tue, 26 Feb 2013 16:46:14 -0000, "Ian Field" >>>><gangprobing.alien@ntlworld.com> wrote: >>>> >>>> >>>>> >>>>>"John Fields" <jfields@austininstruments.com> wrote in message >>>>>news:2dvni890e0mu6d56odaunfsqgu8ssjt7qm@4ax.com... >>>>> >>>>>>On Mon, 25 Feb 2013 22:36:52 -0000, "Ian Field" >>>>>><gangprobing.alien@ntlworld.com> wrote: >>>>>> >>>>>> >>>>>>> >>>>>>>"Jan Panteltje" <pNaonStpealmtje@yahoo.com> wrote in message >>>>>>>news:kgcpgh$ipp$1@news.albasani.net... >>>>>>> >>>>>>>>On a sunny day (Sun, 24 Feb 2013 00:06:18 -0800) it happened Mike >>>>>>>>Cook >>>>>>>><mcham@NOTyahoo.com> wrote in >>>>>>>><0001HW.CD4F09FA05B8251DB04179BF@news.eternal-september.org>: >>>>>>>> >>>>>>>> >>>>>>>>>A friend has a battery powered Ryobi lawn trimmer ("weed whacker") >>>>>>>>>which >>>>>>>>>doesn't work. The 12vdc wall wart puts out only ~ 12.4v. >>>>>>>>> >>>>>>>>>I charged the lead-acid gel cell using a car charger. The charge >>>>>>>>>rate >>>>>>>>>(selectable) was 0.5A. Afterward the trimmer seemed to work as new. >>>>>>>>> >>>>>>>>>Can the car charger be used to charge this battery? He can install >>>>>>>>>a >>>>>>>>>timer >>>>>>>>>to >>>>>>>>>limit charge time if that's something required. >>>>>>>>> >>>>>>>>>Thanks. >>>>>>>> >>>>>>>>Old trick was to put a car headlight or some other low voltage bulb >>>>>>>>(break >>>>>>>>light) >>>>>>>>in series as current limiter. >>>>>>>>Maybe modern car has only LEDs, dunno, :-) >>>>>>> >>>>>>> >>>>>>>Its a trick I often use if I have to, but increasingly I turn to the >>>>>>>more >>>>>>>modern electronic/microcontroller type chargers that automatically >>>>>>>switch >>>>>>>to >>>>>>>trickle charge. >>>>>> >>>>>>--- >>>>>>That's a good thing, since it puts you squarely into the rank of a >>>>>>"consumer", where you clearly belong, instead of into the ranks of >>>>>>designers, where you've clearly demonstrated you don't belong. >>>>>> >>>>>>I could be wrong of course, >>>>> >>>>>Indeed. >>>> >>>>--- >>>>But, more than likely not, since I requested that you elaborate with >>>>an explanation of your "tricks" >>> >>>No you didn't (the senility really is robbing your faculties!) The trick >>>was already described by someone else - I merely replied I do that too >>>(and no - I can't be bothered drawing pictures because you're too thick >>>to understand). >> >> >> --- >> My request was about having you describe the dynamics of a >> light-bulb-in-series-with-a-battery current limiter which, no matter >> how loudly or how long you squeal excuses about why you can't, you >> can't, of course. >> >> Unlike you, I've done empirical work which has resulted in published >> plots of tungsten lamp filament resistances being functions of >> voltages across, and currents through the filament. >> >> I'll email you the plots, if you like. >> >> Your admission to being a copycat hardly qualifies you as an >> authority, and certainly explains why you "can't be bothered drawing >> pictures" of what you can't envision. >> --- >> >> >>>You're not only wrong, but stumbling about in a state of advanced >>>dementia. >> >> >> --- >> Wow, with your super-quick response, you must really want me to notice >> you and have you suck my dick or have me fuck you up the ass... >> >> Sorry, Charlie... >> > One of your fetishes?
I'm not so sure "victim" is quite the right word for whoever JF singles out for a tirade of foul mouthed abuse. He's a sad pathetic figure who's antics serve only to further demonstrate to onlookers that he's lost the plot. He's clearly too demented to have any embarassment about being so brave from behind his keyboard.

"John Fields" <jfields@austininstruments.com> wrote in message 
news:cckri8tludvtpmuq59i88tcnmgqa89h0t9@4ax.com...
> On Tue, 26 Feb 2013 18:44:16 -0500, Jamie > <jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net> wrote: > >>John Fields wrote: > >>> Wow, with your super-quick response, you must really want me to notice >>> you and have you suck my dick or have me fuck you up the ass... >>> >>> Sorry, Charlie... >>> >>One of your fetishes? >> >>Jamie > > --- > No, just conjecture, but it's interesting how, when the conversation > turns lewd, you people are drawn to it like a moth to a flame.
As you're so keen - you can pick up butt pirates while you're standing on street corners shouting at the passing traffic.