[Sneeck]

If you really want to run 30 cell's, i'd get some lipo battery's. The batt's alone weigh ~ 2 kilo's so it will not handle pretty.

Also 30 cell's ~ 36 volt's. If you get the 36120 you need a motor that stay's under the 42.000 rpm. That rule's out the 10xl cause it will be spinnin' at 59688 rpm. The 15xl will be just under the limit at 40032 rpm, but i'd go for the 18xl just to be safe.(since high performance battery's have more volt's when fully charged the motor will spin faster, like a normal 6 cell 7,2 volt pack has roughly 8,4 volt when fully charged. Imagen how many more volt's you got with 30 cell's)

The 18xl will spin at 33336 rpm.