BILL BAUER wrote in a message to Roy J. Tellason:
> I may have to call them again,  or write to them,  and see if I can get
> something a little more detailed out of them with regard to just how I
> can deal with this...
 BB> A $1000 to find out? Is that what your UPS system cost you?
No,  that's what it would cost me to get one that I can add as much battery 
as I want to...
 BB> If so, what brand is it and where is the factory located?
It's an APC model 520ES,  and I don't recall where the factory is located.
 BB> Reason I ask those questions is that I have 9 big UPS systems 
 BB> that were made right here in OKC. And they cost $1000 new. So 
 BB> that set me to wondering if you have those kind of units. Mine 
 BB> are made by Control Technologies here in OKC. They are 1000 
 BB> watt units rated at 5 amps max draw.
I can't conveniently get to the back of this one at the moment to see what 
the maximum draw is,  but I'd assume that the 520 in the model number is 
either watts or volt-amperes...
Pretty close to 5 amps,  anyhow.
> One thing I hadn't gotten around to was deciding what sort of connector
> to use for the additional batteries.  Anything you favor along those
> lines?  They sure don't give you a whole lot of room to work with,
> there.
 BB> I just went down and got me some of those great big binding 
 BB> posts and drilled me two holes in the back wall of the UPS near 
 BB> the upper right hand corner just above the top level of the 4 
 BB> gel cells it cane with. 
This one's got two gels in there,  and I don't know if there's enough room 
for a pair of those binding posts,  it's really a pretty small case.
 BB> The factory told me that these units would not mind one little 
 BB> bit if I installed extra batteries except that the recharge 
 BB> rate would be very slow.
That's something I could live with.
Heck,  one of these days when I'm feeling more ambitious,  maybe I'll rip 
this thing apart and work up a schematic for it...
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