Thoughts on an e revo

[emaxxracer15]

Sometime soon i will be starting an e revo build. im new to the fourms. i plan to run the mm/8xl using the stock tranny. The batts will be A123 cells pulled from a DeWalt 36V tool battery. I have a few questions, one, could i run the whole system using only one larger battery pack instead of two smaller ones? And will this charger work for the A123 batteries?