The DC-UPS powers your devices within the car or truck utilizing the auto electrical system, but switches to exterior battery power when the car or truck's battery is taken out, stolen, or drops below a predetermined voltage, acting like a battery backup (BBU) and power conditioner. Supplementary software package/OS compatibility: https://history-of-judo60582.atualblog.com/40356857/the-best-side-of-power-supply-backup-for-pc