The APC™ Back-UPS™ Connect CP12142LI is an uninterruptible power supply (UPS) that is specially designed to power compatible router/modems and VoIP telephony system for prolonged periods of time during a power outage. APC by Schneider Electric™ introduces an internal lithium-ion battery design which allows for a compact and lightweight design while maintaining an extended runtime for up to 12 hours. Learn more, http://www.schneider-electric.com/ww/en/