I was reading a post about a power failure and the resulting drop in temps. This situation is something that really scares me. I am very sorry for pombikiball whom this happened to! Is there a power back-up system available? I use a herpstat and I know it requires a puresinewave power supply is there a power or heat back up system out there? Do keepers have 12 hour heat packs on hand in case? Where I live it is currently -12.5ºF outside and my place will cool down REALLY fast.