I'm treating mine like a precious gem (my second one)... and have backed it all up in several places... but don't dispair... they are still around in stock, and several companies have come out with even better replacements if/when yours ever dies. (Have you tried RedChair's Audigen software? It's like RioRad but lets you browse/search/stream the ogg files that are on your HD)
By the way... Hurricane Katrina left Miami without electricity for 48 very hot muggy hours (500k people still don't have power) mine just came back on... the Karma kept me (and my music loving cats) sane, and lasted longer than the 15 hours promised. Robert de Visée's Pieces de Theorbo was particularly calming, I listened to three versions for comparison: Hopkinson Smith (still my favorite), Eduardo Eguez and Jose Miguel Moreno. I have a great little stereo battery speaker system by TDK called "I'm a Speaker"... the cats like to lean against it for those nice low theorbo frequencies.
I also distracred myself by playing for many of those long hours!! Till the eye of the storm hovered overhead for two hours, I had not yet been able to play anything from memory... suddenly, during that eerie silence, with the pressure so low that my ears were popping, I managed to play five different pieces in the dark!! woohoo!!