My digital version of Motor magazine arrived today and this months main topic is batteries. I have a question and some info,first the question. Would you expect that your independant shop to do a starting/ charging system test if you simply asked that your car be given a “look over”?. I say yes, and the test should include a scope view of the electrical activity at the battery.
Now the info. A battery with reduced capacitance will show the same wave form as one that is being charged by an alternator with a bad diode (too much AC in the DC). The most startling fact, the number 3 reason for accidental blindness in males over the age of 15 is caused by a battery that explodes during the hook up sequence to make a jump possible. I never realised that battery explosions were this commom. I have only seen one in my life and it was a reverse polarity event, blew a crack right up the side of the battery