- Two voltages available 2.2V 250m A average life 5 hours & 3.7V 300m A 10 hours Two voltages available 22V 250m A average life 5 hours & 37V 300m A average life 10 hours. Lens End MES Type Two voltages available 22V 250m A average life 5 hours & 37V 300m A average life 10 hours.