This is an overview of the new KISS 25A ESC's (4in1 and single)
They are officially rated for up to 5s but they are capable of much more than that (theoretically 14s). I have successfully tested them at 50V (maxed out my power supply) and they performed without any issues. I do not recommend to use them without electrolytic caps on more than 5s though, cause they are small and a limited number of caps were fitted on these small-sized ESC's.
EDIT:
So I got mislead by some info and did not check the MOSFET's datasheet. There are two versions: 8530(30V)and 8560(60V) and the 25A ESC's have the 30V model installed. The rest of the ESC can take up to 60v input voltage but the MOSFET's don't. So for making it capable of over 6S you need to mod the ESC's and change the MOSFET's to the 60V version.
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