ORIGINAL: Junaid Ali
Its better that you use a 2000 maH or higher battery for the ignition since the current draw can go as high as 800 ma at full throttle. At this draw the voltage on a smaller pack will fall quite a bit after a couple of flights.
Where did you obtain that information? Try 400 mAh/hr for a single and 800 for a twin. On a big day it might jump 100 mAh. The people that helped design the ignition suggest an 800 mAh battery as minimum for a single. Any 1,000 mAh 4.8v battery would do quite well for a 50 single.