DC to DC 25A battery charger with a smart BMS system for battery protection against overcharging, automatically disconnecting when the battery is full. It charges from the car's alternator, the main battery, or a solar panel, and supports various battery types like Lithium, Lithium Iron Phosphate, Lead, and Gel. Price: 650 SAR. DC to DC 40A battery charger charges from the car's alternator, the main battery, or a solar panel, and supports various battery types like Lithium, Lithium Iron Phosphate, Lead, and Gel. Price: 750 SAR.