fit-Uptime works similar to an external battery pack/charger with one major improvement – very fast output switching between line power and battery backup. So when grid power is lost and later resumed it will go unnoticed by the PC. No drivers or software to install. No intervention with the normal operation of the PC. No system re-testing required. fit-Uptime can protect your mini-PC immediately out-of-the-box. You do not even need to charge it.