RX8 on fire

[Ola]

I know about ripple voltage..
But if my battery`s are to weak for my setup, i would like to know.. And i really would like a tip towards a brand/size battery that handles alot better..

Right now, i`m running the same batteries both 5s and 6s, on a cc1717 through a MMM esc.. That motor pulls alot more amps than a 1515, so this should make even worse ripple?

The cables was 100% secure, and everything was tight without pulling on eachother etc etc.. The esc wires was even re-soldered acouple days earlier due to the motor change to the 1515.. And yes, the soldering was done properly :)

Sh1t happends, i know.. And i`m not afraid of buying another RX8 in the future, if a sensored motor setup gets tempting to me again..