The Back-UPS Connect CP12142LI from APC is an uninterruptible, external power supply (UPS) that is specifically designed for compatible routers, modems, and VoIP telephony systems in case of emergencies for prolonged periods of time during a power outage. This UPS consists of a 12 VDC / 19,500 mAh lithium-ion battery that is compact and lightweight. It maintains an extended runtime for up to 12 hours, can be recharged in up to 24 hours, and features an output power capacity of 38W / 140 VA with a nominal output voltage of 12 VDC.