14 cells on mamba max,what will happen?

[nitrorube]

alright guysi got one for you,im running a 4cell lipo in my emaxx with a mamba and 8xl feigao,runs great but i thought ide do some experimenting and hooked up 13 nimh and it ran fast and long,if i try 14 cells what can happen,will i damage my mm? temps were fine with 13 cells,this is the newer mm but i installed new firmware.i dont want to destroy my mm