mamba max pro need info..

can i use 4s 30c 4500 or 5000mah in a mamba max pro?and do i need to use an external BEC ?last time i touch electrics i fried an esc and receiver coz i didnt know i needed a bec..thats before the mamba stuff came out..now i dont see anything on the manual about bec..do i just plug the esc to receiver and set it up?im afraid i might fry a new esc.can you please enlighten me?im a gasser and i want to run 1/8 scale sometimes but this time im goin electric.and i think i got a 10th scale esc .i thot i bought a mamba monster..so i dont know if the mamba max pro can handle rc8be?and does it also matter if how many MAH AND C RATING?i forgot already whats the important info about a battery i should check.thanks for the help!!!