The newest and most obvious aspect of the 5S is its 1.25-inch backlit LCD panel, which during normal operations shows the status of input line voltage, condition and load, and the battery charge level. During a power outage, the LCD switches by default to minutes remaining. Also on the front panel are buttons (from top to bottom) for power, LCD scroll and for silencing the power-event alarm. Pressing the scroll button pages through percent, minutes, Hz, kVA or kW measurements. Farther down the front panel, a door opens to reveal the user-replaceable battery. Out of the box, a trip inside was necessary to connect the battery during initial setup.