Line-interactive UPS Systems have the same components as Standby UPS systems (surge/noise filter, battery and inverter/charger); however, they include one component that Standby UPS systems do not—a voltage regulator. By using its voltage regulator to adjust abnormally high or low voltages, line-interactive UPS systems reduce reliance on the battery, lengthening its service life. During operation under normal voltage conditions, the UPS passes input voltage through the surge/noise filter and the voltage regulator before delivering it to the connected equipment. It also uses its inverter/charger to charge the battery, preparing it for use during a blackout or brownout. During operation under blackout conditions, the UPS converts DC power from the battery into AC power to support connected equipment.