Am I way off base here?
UA-5 draws 500mah w/ phantom power on.
Charger rate is 280mah.
So would I charge it almost 2hours(500/280) for every hour I intend to use it or longer?
-Kevin
kevin;
not quite the way you should see things....
you need to keep things separated: 1. charge calculations and 2. discharge calculations (UA-5 consumption).
first, your UA-5 does not draw 500mAH. mAH is a measure of "capacity". you probably meant that it draws "500mA" per your manual, etc.
depending on what type of battery, capacity of battery and the environment, your charge curve and discharge curve my well be different.
you can always use ballpark figures, but i would calculate how long it would fully charge your battery based on your charger/battery combo. then, figure out how long the fully charged battery will power your load source (UA-5). keeping one calculation separated from the other.
equating your charger's output capacity to your UA-5's current draw is totally incorrect.
hope this helps,
marc