Li ion batterys

[timmy]

I don't really know where to post this question but I have a helicopter that had 3.7 volt 1500 mah lith ion batterys that went bad so I replaced them with the same only with 3000 mah the problem is it won't lift off so my question is that is there a discharge rate difference between the 2 different mah batterys. Does the 1500 deliver more amps then the 3000. I know the 3000 mah would give more lasting time but the discharge rate I don't know.