OhioBuckeye

I'm looking at these 1500Mah batteries:
http://www.cheapbatterypacks.com/mai...r=28&model=367

Would you say these would work fine? Also What about their upgrade option? is it worth it? Seems high since it's about 20% of the cost of the batteries.

See upgrade option info below:
What is upgraded?
Upgraded means your cells will be hand soldered. The "end to end” soldering method will be used which will give your pack lower resistance; this should increase your performance. Where cells are positioned side by side we will use 100% copper bars that have a special nickel plate on them to keep the bars from oxidizing. These bars are like 10 awg wire. These methods are used to let the current in your battery flow as fast as possible. The lower the impedance (Resistance) the more watts we can give you. This means faster top end and better acceleration.
We really recommend "upgrading" for all SC style cells used in Airplanes, Cars/Trucks, helicopters and Boats. For Airsoft amp loads are usually lower and welded tabs (standard method) can be used. This lowers that over all cost and still gives a great performing battery.
"upgrading" can "NOT" be used in cells under A sized. So AA and AAA cells must be welded and the upgrade option is not given.
Standard packs are spot welded which uses very little heat and creates a very good connection. The nickel tabs used in this method are like 16awg wire but nickel is not as conductive as copper. So there is more resistance. In low amp applications (under 30 amps) you really can not tell a big difference. So for Airsoft and 1/18th scale cars we recommend sticking with the standard method.

Probedude

Someone in another thread said the 'upgrade' isn't worth the price difference.
Per their site "In low amp applications (under 30 amps) you really can not tell a big difference."

AEAJR

Those packs should work fine.

If you have room, have an 8 cell pack made. your ESC and motor should be able to take it.