Hi, I'm new on that site, I have a problem with my battery charger and I want to know what this piece is for. (I did an black arrow on the picture, to show you where thie piece is) One side of that piece is connected to the battery and it indicated 12 volt, and the other side come from the charger and it indicates only 9.9 volt.
thank you for your help.
thank you for your help.