>Now, I have a battery here that claims 58AH.  My google research tells me this 
>means 14.5A for 4hrs, at which time the battery voltage will be 10.5V.  But 
>that is apparently 10.5V *loaded*.

I'm not 100% certain about that last point.


>So what happens if I only consume 2A -- does it also mean that I can get ~2A 
>(being conservative) for 29 hrs and the ending voltage will still be 10.5V?

It will last a bit more than 29 hours. The less aggressive you run the battery,
the better efficiency it has.

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