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   alt.engineering.electrical      Electrical engineering discussion forum      2,547 messages   

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   Message 616 of 2,547   
   Jamie to John Fields   
   Re: Charge gel cell with car charger?   
   26 Feb 13 18:44:16   
   
   XPost: sci.electronics.basics, sci.electronics.components, sci.e   
   ectronics.design   
   XPost: sci.electronics.repair   
   From: jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net   
      
   John Fields wrote:   
      
   > On Tue, 26 Feb 2013 21:43:13 -0000, "Ian Field"   
   >  wrote:   
   >   
   >   
   >>   
   >>"John Fields"  wrote in message   
   >>news:gh9qi8t3alcietnh2r674clj7ne976j2af@4ax.com...   
   >>   
   >>>On Tue, 26 Feb 2013 16:46:14 -0000, "Ian Field"   
   >>> wrote:   
   >>>   
   >>>   
   >>>>   
   >>>>"John Fields"  wrote in message   
   >>>>news:2dvni890e0mu6d56odaunfsqgu8ssjt7qm@4ax.com...   
   >>>>   
   >>>>>On Mon, 25 Feb 2013 22:36:52 -0000, "Ian Field"   
   >>>>> wrote:   
   >>>>>   
   >>>>>   
   >>>>>>   
   >>>>>>"Jan Panteltje"  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   
   >>>>>>> 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   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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