You have corroded battery terminals. Auto batteries Possess a optimistic along with a negative terminal (The 2 terminals that you choose to connect jumper cables to when bounce-commencing an automobile). Corrosion close to a battery terminal—a powdery buildup that’s normally white, environmentally friendly, or blue—can hamper battery functionality. According to https://dailybookmarkhit.com/story18124684/facts-about-car-battery-charger-revealed