> My trouble is that I connected the converter ground to the battery pack and
> then when I touched the positive wire to the battery terminal there was a
> big blue spark and now the converter is no longer working. :( I haven't
> repaired the converter yet, but I'm wondering if the converter design I used
> is appropriate for this application?
>
> I would appreciate any suggestions, insight, or questions.
>   
My first throught would be you probablly need something to limit current 
flow into the battery and a diode to prevent backflow from the battery 
to the converter.


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