APC Smart-UPS XL 1000VA USB & Serial 230V No Battery

Boost and Trim Automatic Voltage Regulation (AVR) Gives higher application availability by correcting low and high voltage conditions without using the battery (not available on all models).
Intelligent battery management Maximizes battery performance, life, and reliability through intelligent, precision charging.
Automatic self-test Periodic battery self-test ensures early detection of a battery that needs to be replaced.
Automatic restart of loads after UPS shutdown Automatically starts up the connected equipment upon the return of utility power.
Power conditioning Protects connected loads from surges, spikes, lightning, and other power disturbances.
Temperature-compensated battery charging Prolongs battery life by regulating the charge voltage according to battery temperature.
Disconnected battery notification Warns when a battery is not available to provide backup power.