I've just bought a AE B4RS with the standard ESC and Brushd Reedy motor in it, what would happen if i took a 2S 5000mah hard case pack that I have and hooked it up? Would things likely fry?

Be great if i could use these lipo's instead of the Nimh packs I have, even better if i don't have to shell out for a new ESC and motor to do so!!

Cheers!