just so im clear
While Im flying and I see on my ammeter lets say 40 amps
1. This is the amount of amps being fed into my Battery by the alternator. If it is zero the alternator is broken
or
2. This is the amount of amps being used by my battery and the alternator will be working in the background toping up the battery
So the battery will power everything and the alternator will just keep recharging the battery??