Shorai LFX36 is holding 13.79v after sitting over night. seems to have recovered after being drained to 6.5v or completely dead. second battery installed drained to 13.09v after sitting overnight. starting volts was 13.44v. there's now a dead drain of 700 milliamps with everything off on R80G/S. have not tracked current drain down yet. probably a diode failing. battery going dead was zero fault of Shorai LFX36. goes to show you, best not to jump to conclusions until everything is checked out.