Apexi charging stabilizer

i understand companies promoting electric superchargers, but why would company as big and respected like apexi have products on the same level as all that other crap?
 
It looks like a supressor, nothing more. I wouldn't bother.
 
It looks like a supressor, nothing more. I wouldn't bother.

cheers for the constructive answer ed (thats not a mickey take btw) any chance you can do a quick explanation of how these work? i know they obviosly keep charge/current at a steady level, but surely the 12v wouldnt fluctuate that much to justify one?
 
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