Most ‘handy’ adults will be able to fit a car battery themselves. It is not a physically demanding procedure and as long as you follow the rudiments you will be fine. Good technicians will make sure they wear protective gloves and some form of eye protection. While an unlikely occurrence, acid spills need to be guarded against. Likewise it is prudent to work in a well-ventilated area to ensure no toxic fumes are breathed in. With car in gear and NOT running remove the lead from the black side (negative) first followed by the lead on the red side (positive) and then lift the battery out. Even though a car battery looks pretty harmless it is very important to be respectful of the fact that it contains highly corrosive acid. You can then reconnect the leads in the opposite order. Connect the red one first, followed by the black one last. If not done properly, your electronic components may not work. SO BE VERY CAREFUL.