Highlife Rechargeable LED Emergency Lamp is equipped with 30 powerful LEDs and silver plated reflectors to brighten up your life. With only 2 Watt power consumption, it is one of the lowest. The lamp uses rechargeable sealed lead acid battery (4V-4 Ah). It will light up automatically in case of a power failure, when connected to a power outlet. It has two modes: High (30 LEDs) and Low (20 LEDs).