Ni-MH

Ni-MH -"A nickel-metal hydride battery, abbreviated NiMH, is a type of rechargeable battery similar to a nickel-cadmium (NiCd) battery but has a hydrogen-absorbing alloy for the anode instead of cadmium. Like in NiCd batteries, nickel is the cathode. A NiMH battery can have two to three times the capacity of an equivalent size NiCd and the memory effect is not as significant. However, compared to the lithium-ion battery, the volumetric energy density is lower and self-discharge is higher."

Xenon Light

Xenon Light (Halogen Light) - "Xenon is a chemical element that has the symbol Xe and atomic number 54. A colorless, heavy, odorless noble gas, xenon occurs in the earth's atmosphere in trace amounts and was part of the first noble gas compound synthesized. It has many uses such as Xenon lamps, IMAX film projection systems and as a general anesthetic." Xenon Light represents bright and high power light source.

Scuba diving light

Scuba diving light – "Scuba diving is swimming underwater while using self-contained breathing equipment. By carrying a source of compressed air, the scuba diver is able to stay underwater longer than with the simple breath-holding techniques used in Snorkeling and Free-diving, and is not hindered by air-lines to a remote air source. The scuba diver typically swims underwater by using fins attached to the feet." Scuba diving light is special design lighting, its halogen light bulb provides sun white light output for video light, dive light or back up light or in scuba diving environment.

Rotary Switch

Rotary Switch – "A rotary switch is a type of switch that is used on devices which have two or more different "states" or modes of operation, such as a three-speed fan or a CB radio with multiple frequencies of reception or "channels".

Rotary switches were used as channel selectors on television receivers until the early 1970s, as range selectors on electrical metering equipment, as band selectors on multi-band radios, etc." Rotary switch is also used in diving light equipment.