This is a reasonably good price on a dual battery UPS which has longer runtimes or higher load capacity
http://www.ebay.com/itm/351083233277
it uses two RBC2 batteries which are the most cost effective
note even if the unit is new, I bet those batteries are a couple years old by now with old stock, and sealed lead acid don't do well with voltage drop for long periods of time
I like the voltage boost ability, hopefully it is modern AVR that does not use the battery and only the transformer inside
http://www.ebay.com/itm/351083233277
it uses two RBC2 batteries which are the most cost effective
note even if the unit is new, I bet those batteries are a couple years old by now with old stock, and sealed lead acid don't do well with voltage drop for long periods of time
I like the voltage boost ability, hopefully it is modern AVR that does not use the battery and only the transformer inside
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