yeah, i don't use mine a ton but so far no issues. i put on a strip of velcro so it doesn't slide around and just left it under the passenger seat. I plug it in behind the center console when i want to use it. when i bought mine it also came with clips so you can attach to the battery directly, looks like you have to buy those separate now. I used the clips a lot to charge stuff when camping without running the engine before i installed an always on outlet.
i'm pretty surprised though that the razor plugs in, i thought they were pretty much all battery powered. i can't imagine the razor requiring a lot of power (maybe 25 watts?) so pretty much any cheap inverter should work.