i got a zoom and no it is not a tail problem

...the ESC or the speedcontroller keeps heating up very fast (like in less than a minute) then all the servos can't move anymore...i turn it off...then on again but this time it happens faster...probably cuz the ESC is already hot...18A ESC with 11.1V 1800mah battery...i changed it to 25A and same problem...what should i do? would plugging a second battery directly to the reciever help? bought it for like a month and i cant fly it so desperate lol....