bud7h7 wrote on Apr 25^th, 2012 at 2:45am:

I'm confused now because you replied to CS that the generators were on. With only battery power then obviously in time they will die (although usually too soon in FS). But with GPU power, APU or generators 1 & 2 on, batteries should not drain.

As I said in my reply above. I usually use the EP and BA, OR APU, once I get into the 737 and power it up. On the occasion where it locked up, I did not use them. When I deliberately tried to drain the battery power, two hours passed without the loss of power using the battery only. Got me beat.

Edit: My apologies bud7h7! You are right. My Generators were OFF. It is not possible to turn them on when the engines are not running.