Car Chargers Keep Blowing Out
 

I got SIRIUS satellite car kit which plugs into the electrical outlets
in my Honda Accord (2004) and the first one died after less than a
week, then I exchanged it for a new charger and that one died in 5
minutes. I was then thrilled to find that a charger I have for another
device matches the specifications of the Sirius charger, so was using
that and now this morning that charger is dead. I'm starting to wonder
if maybe a power surge is causing this? Should I always unplug these
chargers when I turn off the car, and not plug them in again until the
car has been started? I took the one charger apart...can I repair it
by just replacing the little cylinder fuse inside? Are they easy to
find? Any help would be appreciated.