Thanks for the info Jim I use the 600 mAh and test before every flight using my meter and a resistor to give it a half amp current draw. I stop flying at 5 volts. usually 3 flights of 10 to 12 minutes. It is good to know that the 600 mAh is hardier than the 2000 mAh. I think I will stick with what I know. I take out 3 planes when I go to the field so 9 flights is more than enough for me.

Calvi