You've got corroded battery terminals. Car or truck batteries have a favourable in addition to a destructive terminal (The 2 terminals which you hook up jumper cables to when leap-starting off an auto). Corrosion all over a battery terminal—a powdery buildup that’s usually white, green, or blue—can hamper battery functionality. https://medium.com/@business.orders.online/quick-car-battery-replacement-sharjah-warrantee-تبديل-بطارية-السيارة-في-الشارقة-43bde418ddc4