How do you hook up a battery to a hardwire radio?
Crimp the bare end of the black wire onto an alligator clip. Connect the radio to the battery by first clipping the alligator clip with the positive wires onto the battery’s positive terminal, then clipping on the negative wire to the negative terminal. Turn on your car stereo to operate it.
Can I wire my radio straight from the battery?
Yes, you can connect a car stereo directly to a battery.
However, you will have to make sure that the battery that you are connecting it to is a 12-volt battery. Preferably, it should also be a car battery.