APC by Schneider Electric Smart-UPS 500VA Rack-mountable UPS - 1U Rack-mountable - AVR - 3 Hour Recharge - 2.70 Minute Stand-by - 120 V AC Input - 120 V AC Output - 4 x NEMA 5-15R - SCL500RM1UNC

Cold-start capable - Provides temporary battery power when the utility power is out.
High online efficiency - Reduces utility costs, generates less heat.
Lithium-ion battery - Lithium-ion batteries provide twice the service life of a typical lead acid battery and are small, light and environmentally friendly.
Predictive replace battery date - Dynamically provides the month and year when battery replacement is recommended to aide in long term maintenance planning.
Preinstalled network management card - Provides for remote management and control of the UPS over a network out of the box.
Short-depth rack compatibility - Compact design fits comfortably in short-depth rack applications.
Single switched outlet group - Single outlet group that may be controlled separately from the UPS for discrete reboot of hung devices, sequenced on/off and non-critical load shedding.
Temperature-compensated battery charging - Prolongs battery life by regulating the charge voltage according to battery temperature.