[lincpimp]

Not sure if the evx2 can handle 5s LiFe cells in series, that would be 18v fully charged...

I would go with a pair of the 2s2p 4500 packs. Plug them in like you would do with stick packs and go play. No need for a lvc, just stop when the performance dies off. It is a brushed truck, just leave it stock and enjoy it for what is is.

As for waterproofing the packs, dip them in plastidip, of use a small ziplock baggie. Unless you plan to submerge them in water, you really do not need them to be 100% waterproof.

I just checked the balance of the LiFe pack I have as I received it and it is almost perfect. I plan to get a setup together to run this, might be a week or so...