How To Disconnect Car Battery Without Tools. Open the hood and first connect the red cable of the charger to the positive terminal of the battery and then the black cable to the negative terminal. Select a 10mm 04 in wrench or socket as most car battery cables have this size nut attached.

And the black car cable to the black jumper cable wire. There might be several clamps so inspect the outside of the battery carefully. How difficult is it to change the car battery yourself.
If necessary remove the bracket holding the battery in its tray and lift the battery out.
Changing a car battery is relatively easy. Under the drivers side of the dashboard on the steering column. You just have to disconnect the terminals in the right order unscrew the nuts and bracket that hold the battery to the plate and youre all set. The other option is to connect a jumper pack to the car cables to provide the power necessary to keep the car dashboard on.
