Overview: Mode: Aurora AK-P7-3 Features a Seoul Semiconductors SSC P7 (C-bin) high powered LED emitter Accepted input voltage: 7.4V ~ 17 V Powered by 2 x 18650 (8.4V), or 4 x CR123A (16.8V) lithium batteries 900 lumens brightness (manufacturer rated)5-mode tailcap switch: Hi gt; Mid gt; Lo gt; Strobe gt; SOS2.5~3 hours total runtime (manufacturer rated) Regulated driver circuitry Manufacturer's rated current output measured at LED (tested using 2 x 18650): High: 2960m A Medium: 400m A Low: 80m A Strobe/SOS: