gp batts?

a hb cyclone, and a trinity co27 27 turn motor

run times need to bee 15 20 mins, price will determin that lol... id like as long of runtime i can get with 50 bucks a pack, i guess if i did like 4200 i could get less, but i want a minimum of 3 packs (one cooling, one charging, and one running)

i will be using a superbrain 989 charger, so can someone tell me what setting or anything i should do? no dischager, i am not going to be that competitive yet, so thats why i want more basic



and if anyone knows, whats a good speedo thats fwd only? undeer 70 bucks.. thanks