Seems easy enough! However, even when I am in the hanger playing with my electronics I get nervous to leave them on without the plane running for over a half four. This 44minute wait will not kill my battery?
I would not advise people to attempt things that they know little about.You can also attach an external, appropriate, charger to your battery while one screen is on to re-charge the backup battery. Then do the other.
I think RAYMO's point is that after the backup battery test, one could leave one dynon display on (i.e. master switch on but everything else powered down) AND have a 3-4 amp charger connected to the aircraft battery. This will provide enough voltage and current to recharge the display's backup battery. I have done this is the past, as I don't always want to take off with potentially dead backup dynon batteries. I'd rather they be charged just in case I have the bad luck to have an electrical failure on that first flight after doing a backup battery test.
Did I ever say that a low state battery would be fully charged after taxi and climb? NO.I was racking my brain trying to figure out what was "dangerous" about this- jees. I can also guarantee DBVR10 that there is no way a mostly depleted backup battery will be charged back up after just a taxi and takeoff- it takes at least 1 hour, closer to 1.5 to reach full charge.
What has the potential to cause confusion is the underlined bit. Which battery are you connecting a charger to while you test the other screen? Someone could read that as to mean directly to the SV-BAT-320.....because in most planes you would need to pull a breaker or via a VPX isolate the second screen while you did that.You can also attach an external, appropriate, charger to your battery while one screen is on to re-charge the backup battery. Then do the other.