[highflier]

Do some math. 12 cell 3300's = 47 watt hours
You use 7 watt hours per minute

You could run 4s A123 14.4 volts To get the run time you want you will need 47 X 2.5 watt hours = 117 watt hours
each 4s1p pack will give you 33 watt hours 4.7 min runtime
4s2p = 66 9.4 min run time
4s3p = 99 14.1 min run time
4s4p = 132 watt hrs. 18.8 min run time



That will be $200.00 worth of cells, 2 dewalt packs converted. Plus you will have 4 spare cells

If it were not for your ESC limits I would really say go 6s3p then your could get a few deep cycles and charge the pack up in less 15 min. so you could play as long as you want!
2 complete sets would give you non-stop play.

Your current pack should weigh about 1.75 lbs
The A123 4s4p pack would weigh 3.00 lbs
However if you say with NMHI 1.75lbs * 2.5 = 4.3 lbs ( in theory)

So that would save you 1 1/3 lb. on your truck and the pack only cost 200.00 what a steal


Your 5000 mah NMHI is 72 watt hours or 10 min of run time

End result. build yourself 2 sets of 4s3p packs, you'll run all day and 14+ min per run. All and all you will spend about 300 for the packs. This will weigh just a tad over what you run now!

Highflier