[PowerRocks]

What is the maximum discharge rate? The big C value that is on the pack. You might not need more mah. Depends on the weight of the vehicle and gearing and what not. Best way to learn is trial and error. Use one pack for now, then either increase pack capacity or put two in parallel. So you could buy two packs, and use them seperately. As soon as one pack dies switch out and put in the other. Probably give you more run time than putting two same paacks in parallel. This is only because you are pulling around the weight of one pack at all times. Now if you need to draw more current which is unlikely then you will either put them in parallel or go to a bigger pack with a higher discharge rate, if not already there.