You've corroded battery terminals. Car or truck batteries Have got a good and also a detrimental terminal (the two terminals which you link jumper cables to when leap-starting up a car). Corrosion about a battery terminal—a powdery buildup that’s generally white, green, or blue—can hamper battery function. Car Battery Replacement https://medium.com/@business.orders.online/battery-replacement-sharjah-affordable-fast-and-reliable-971559035981-849d72e2c4f0