I have an APC UPS backup system for my tivo. Yesterday, someone was power washing deck (apparently on same circuit as tivo) when the circuit breaker triggered. I thought I was protected by having the battery backup unit supplying power to my tivo and tv. There was some occasional beeping....I assume from the back up. After we reset the circuit breaker, the tivo had a screen that said it had experienced a serious error and might take up to 3 hours to recover. Fortunately, it didn't take that long before it rebooted itself and then was usable. It had been recording shows at the time of the power outage but they were lost. I thought this was the point in having a battery backup. Am I doing somethng wrong?