The DC-UPS powers your tools from the car or truck utilizing the motor vehicle electrical system, but switches to exterior battery power in the event the vehicle's battery is taken out, stolen, or drops down below a predetermined voltage, performing to be a battery backup (BBU) and power conditioner. Dollar https://hollywood-wax-museum-myrt38269.blogsumer.com/33294349/the-smart-trick-of-12v-power-supply-backup-that-nobody-is-discussing