Um… Well, you use the rated voltage (7.2vdc) of the battery for your selection. We just added the right off the charger info because I got tired of answering the question…
The motor requires 200mA no load, around 1.5 amps at maximum efficiency, and 3.8amps stall. The motor should never stall. So the 4 motors should draw around 6 amps when they are doing work.
The motor controller says 3.5 amps cont. 9 amps max.
this assumes the robot will draw 6A continuously… as in never stops accelerating or pushing its way through shag carpet.
Point being you should get more than half an hour operating with this pack with a maximum combined motor drain of 6A.
ok well its a four motor setup, they will be independently controled and used intermitantly. im not so much concerned with how long it will last, just so the motor will in fact operate with that battery.