Tridonic 89800122 EM powerLED BASIC 4 W Emergency lighting LED Driver for manual testing Operates with a 5 Cell NiCD Battery (Sold separately) For self-contained emergency lighting SELV for output voltage < 60 V DC Low profile casing (21 x 30 mm cross-section) 5 years guarantee Non maintained operation Constant current mode With either screw or clip fastening (clip-fix) 1, 2 or 3 h rated duration Selectable operating time (jumper) Green charge status display LED Output power limitation Automatic restart after LED replacement Electronic multi-level charge system SELV classified (outputs powerLED, battery, status LED, test switch) Polarity reversal protection for battery Deep discharge protection Very low energy consumption from the battery after activation of the deep discharge protection Short-circuit-proof battery connection Emergency lighting LEDs available Tridonic 89800122