Is it posibly to use thunder power 2480 mah 11.1volt 15c battey in a heli-max axe cp?

yeah probably. The only factors would be size, balance, and weight. Just make sure it's not too much heavier than the stock pack.

I don't think so. The added weight could cause your motor to overheat.

how heavy is the stock pack on the axe?

the 2480mAh pack would probably weigh about 200-220g or so depending on the mfg and the C rating.