I've had an occasional 'caution low backup battery' annunciation come on but after doing the BU Battery check last week (passed), it does'nt seem to want to recharge. Airplane is new, 35 hours, voltage at cruise ramps up to 14.2 and amps run 1-2. After a couple of hours flying I'm still getting alternating low voltage or offline warnings. Do I keep flying or is it going to need a charger?
BU battery shows around 10.25 volts.
BU battery shows around 10.25 volts.