UPS Question

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Well,

After just having spent a thousand pound on a new system, and having just had a powercut only an hour or two ago while using it im kinda really wanting a UPS to protect the machine from future powercuts. So my budgets £90 for one, anyone got any recommendations? As i honestly have no idea what to look for with UPS's. Preferably one that gives me enough time to shut down my machine (or does it for me) and has at least some battery life that will allow me to run for a few minutes on the UPS itself without mains power.

 

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Im looking at one of the belkin models, however i have a quick question, on the cable type it reads: 1 x serial - RS-232 - 9 pin D-Sub (DB-9) ¦ 1 x USB - 4 PIN USB Type B, what does it mean by type B? I thought there were only two types ( USB 1 & 2 ).