Batteries?

[BADNBADN]

Whats the best? Whats the fasest? Whats li-po?

[therczone]

There is no best.
There are no fastest, but the Team Helotes 7.2V or United RC X71 (7.2V) packs should be sweet.
Li-Po is Lithium Polymer. Lithium being the battery, and polymer meaning man made. There are also Lithium Ion's. LiPo's are extremely fast, but also dangerous because of charging fires.

[Rc-Archer]

www.cheapbatterypacks.com offers three different custom 1100 battery packs that will fit the RC18T. Three different prices to fit your budget. The most expensive is $18.50 with a HPI connector. The cheapest generic packs are about $11.50.

[BADNBADN]

does a 8 cell make the truck faster than running a 6 cell? What batteries do ya'll run?

[therczone]

Only way your getting an 8-cell is if you custom order it or make it yourself. No such thing as one for the RC18T. And yes, it will help. Imagine running 2 cells. It would barely move.

[Rc-Archer]

does a 8 cell make the truck faster than running a 6 cell? What batteries do ya'll run?

Sure will!! But first you need to check to see if your ESC/receiver is rated to handle 8 cells else you risk burning them up. The stock ESc is rated for only up to 7 cells. Also realize that that the motor will burn out much quicker if you run it on 8 cells.

If you want to go faster, I'd suggest a motor and a ESC upgrade before adding more cells.

I've got a couple GP 1100 6 cell packs on order right now.

[team helotes]

The stock speedo will only handle 7 cells. Here is a link to a 7 cell pack.
http://teamhelotes.com/~main/catalog/i122.html

[therczone]

Jeff (team helotes) is correct. A 7 cell is 8.4V. The stock ESC (AE XPS) can handle 8.5V.

http://www.rc18tonline.com/documents/rc18t_xps_speed_control_setup.jpg