HUP VS Rolls [RE-wrenches]

[Windy Dankoff]

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Wrenches -- My anonymous lurking buddy contributes this to the  
discussion.
-- Windy
> I've been following with some interest the never ending battery  
> saga on the Wrench board.  The latest rendition centers around the  
> Rolls/HUP debate, and how Jeff Yago was unable to get a set of  
> Rolls fully charged.  Not to attack nor defend Rolls (I don't have  
> any experience with them myself) .. I know of instances in  
> batteries where the mfgr-supplied H2SO4 was too weak and  
> subsequently lacked the necessary strength to ever fully charge.   
> The weak electrolyte manifested itself by lower-than-expected cell  
> voltages (takes a good DVM to differentiate), decreased A-H  
> capacity from spec, lowered SG, and the inability to ever fully  
> attain 100% SOC, particularly as measured by the SG.  In the  
> instances with which I'm familiar, when some of the existing  
> electrolyte was removed and replaced slowly by a more concentrated  
> H2SO4 solution, the SG increased to expected values.  Following a  
> reconditioning charge, the battery functioned normally thereafter.
>
> Not saying this is the case here .. but it has the same feel...


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