does anybody use a power invertor with their mazda 3? if so which one and does it fit okay like out of the way and not take up any space.

was going to buy a charger for a cell phone but I think I am just going to get a power invertor and use the charger that came with the phone. older phone and a car charger was hard to find for it.

was just wondering if anybody uses a power invertor that fits nicely and out of the way on the mazda 3 - been looking and really haven't had any jump out at me.