Around here we get some good storms that pop up (usually when im at work) and the power likes to go out. Luckily my wife was home the last time anx was able to unplug my filters. But if shes not home the next time, do they make some sort of back up power supply i can plug into the wall and plug my filter in? So that when the power does go out it will switch to battery power and keep goin for a while longer. As mg filters arent self priming... its storming pretty good now thats why i thought of it.