mark lewis wrote in a message to Roy J. Tellason:

 JH>> The APC 420 Smart UPS Pro unit I have here just uses a 12V 7AH
 JH>> battery - - just 84 watt-hours of power.

 ml>> wow, that's a "little" one > all
mine are 650s and up with two
 ml>> 1000s and an 1100...

 ml>> FWIW: yes, the APC UPS' are what i'm wanting to either enhance,
 ml>> extend, or replace... but $$$ are a concern...

 RJT> It was APC that told me you couldn't extend the operating time
 RJT> on their units...

 ml> well, that's patently wrong unless they've gotten real sneaky and
 ml> know how long the unit will provide power with one of their
 ml> batteries in it fully charged at the measured load being drawn and
 ml> use some sort of cutoff method to shut it down at that point even
 ml> though there may be plenty of battery power left...

No,  what he said was that I'd "burn up the inverter in there"...

 RJT> Nor would they provide me with any technical specs, schematics,  
 RJT> or any other info,  for that matter.

 ml> yeah, that's always a bitch... its also why i have one or two here
 ml> that are open :wink:

Eh?

 ml> i might take them up on their offer of upgrading but i'm not sure
 ml> there's a real cost savings to be had...

What offer is that?

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