Does anyone know of a backup power (ups) to send an e-mail when activated?

Can you answer Justin M’s question about Generators?:

I am planning on setting up a wireless video camera network to send an e-mail notification when motion is detected in the area. The camera does not support POE and has to have a 5v DC input for power. I can set up a UPS but I don’t want the ups to go dead and have no power to my camera and not have video surveillance during that time period. Is there a UPS that can hook up to a network and send an e-mail notifying me that power has gone out?

Gas Power Generator

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