I just installed one for a friend and did it direct to battery. He is not concerned with leaving it on all the time as he will put it away and lock it up upon arrival.
I installed a 12 v receptical on my bike and use it for phone, gps whatever. Again, I direct wired it.
It really is a choice. If you remember to unplug it...no problem...if you are forgetful then wire it in to another circuit that shuts off when the key does. My fear was overloading any circuit.
I have seen great arguments for each. So far neither of us have had any problems.
I installed a 12 v receptical on my bike and use it for phone, gps whatever. Again, I direct wired it.
It really is a choice. If you remember to unplug it...no problem...if you are forgetful then wire it in to another circuit that shuts off when the key does. My fear was overloading any circuit.
I have seen great arguments for each. So far neither of us have had any problems.