The halogen Bulb is made accessible by removing the front cover and can easily be replaced. The heart of the two lamps is the switch module which accommodates the front and rear threaded covers. The magnetic pressure switch which controls the electronics needs no penetration of the housing. A Hall sensor measures the magnetic field changes created by the movement of the switch. These changes are then decoded and an illumination is produced that is relative to the movement of the switch, (the more the switch is depressed, the brighter the lamp illuminates). The standard 20 watt HLX high power halogen Bulb is supplied with a controlled over voltage. The Bulb effectively has more than a 30% increase in illumination.
For charging, the rear tube is unscrewed, accessing the charger socket. After removing the rear tube, the cell pack is easily replaced with a spare fully charged cell pack within seconds. The lamps are exclusively powered by Class "A" Nickel Metal Hydride rechargeable cells.
A discharge protection switches the lamp off and prevents the voltage in the cells falling below 0.9 volts, before this occurs however, a low capacity warning informs the user with 3 blinks of the halogen Bulb of the imminent end of the burn time. The lamp can then be switched over to a reduced power setting, thus extending the time before the lamp turns itself off. The switch also allows signals to be sent using the Morse alphabet. It is also possible to activate the automatic SOS distress signal, (3 x short, 3 x long, 3 x short). The switch can be deactivated preventing the lamp from inadvertently being turned on, for instance during transportation.
An automatic charger is supplied with each lamp, suitable for use with either 115 or 230 volts. The charger switches automatically over to a pulse trickle charge when the cells are fully charged. The state of charge is indicated by an LED signal. Charging takes about 2-4 hours depending on status of the battery and the charger includes international plugs for traveling.