Hi Shankar,
I'm unable to access the external link you posted (work restriction - blog)and was simply referencing what was in this thread and m.shalaby's apparent confusion.
m.shalaby may/not have the same access issue, either way its simpler for the info to be here.
The battery confusion and misinformation was getting worse as the thread progressed.
I'm not debating which is better, just helping to define misconceptions.
For me personally i would probably go with an Al Jacobs Black Box, but they are quite pricey especially after adding in the appropriate cable for your flash/es.
The black box may not have the speedy recycle time, but its less likely to fry a flash.
Some people concentrate solely on speed (which is partly understandable depending on their subject) without considering the consequences.
If i had that need for speed, i would carry a second flash so i could alternate between the two and allow the hot one time to cool down between bursts.
btw, thanks for the link 
will check it out after work