|  | | quote |  | Originally posted by theogre: 
 If battery is dead... Just get a new battery. Many places can get one locally.
 
 
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I agree with that, unless you know for sure that the UPS charger or inverter electronics have failed.  See below.
|  | | quote |  | Originally posted by Cheever3000: 
 Opinions?  Recommendations?  What to avoid?
 
 
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First, something in the 500 VA (~300 W) range is appropriate for most modern home computers.  Anything larger will just buy you more time while running on battery.  FWIW, most power failures last less than three minutes.
I used Tripp-Lite UPSes for more than ten years, both low-end and high-end models, and they worked fine when they were working, but I began to experience a high failure rate when their batteries (inevitably) failed due to extended charging.  Old-age decline in a UPS battery should never cause a failure in the UPS electronics, but the failure rate in my Tripp-Lite units eventually exceeded 75%.  I have since moved to inexpensive APC UPSes, with excellent results (so far).  The APC units seem to incorporate "smarter" chargers that keep the batteries topped up without overcharging them, so their batteries tend to last quite a bit longer.  About $50 (on sale) will buy you a very good quality APC BE550G (550 VA / 330 W) UPS.
[This message has been edited by Marvin McInnis (edited 02-23-2013).]