As long as your Battery charging voltage does not exceed the rated
voltage of the ITX or the Phidgets then , you should have no worries.
I would recommend you find out the max voltages of your peripherals
first. Then use a regulated power supply of 13.8Vdc or less
Personally, I'd recommend plonking the money down on a good battery
charger -- the OP will find his batteries last a whole lot longer. I use
the Battery Tender Plus for my 7.2AH and under 12 volt batts.
SLAs aren't as sensitive to poor charging regimes as are NiCads, but
they're still surprisngly sensitive.
It's hard to tell without access to the docs (I'd have to register), but
it's likely much better than a simple 13.8v constant current power
supply, which is often used to charge SLAs.
Cheers -- m
Sorry, I guess I misread this the first time, thinking you were talking
about Nicad/NIMH batteries.
SLA or Gel and a float charger works fine for this sort of service, as long
as the battery is rated for deep cycle service, and the charger is adjusted
I run my ham radio gear this way, loads of 200-400W with a 25AH battery and
a simple "one-stage" float charger.