Is 220 V (fast)charge or 110 V (slow)charge better?

First of all, did you know that your car has the capability of charging itself if you run out of electricity and have to drive on gas? It took me about two years to find that feature because my dealer never told me about it. At home, I have been using the 220 V on a 40 amp fuse for over three years with no problems and no significant increase in my hydro bill. My dealer said it was ok to do so but who knows, Toyota is just using us ginny pigs.

A little late here, but it's true of all rechargeable batteries that slower recharge generates less heat, which is what damages the battery and shortens its lifespan in the long run.