EarthX makes 2 certified batteries, but one is 24V. I do use these, but use the ETX680C. I did not build my plane with a Garmin panel (offered by CC) nor did I use the CC backup battery system.

I wired my own panel (Dynon) and ignition backup. I use 2 of the EarthX ETX680C's as stated above.

I'm guessing here, but what the electronics see is volts and amps, not the type of source (lead, LIPO,...). I think the question comes down to reliability, performance, personal choice,...