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A mechanically powered flashlight (UK: mechanically powered torch) is a flashlight that is powered by electricity generated by the muscle power of the user, so it does not need replacement of batteries, or recharging from an electrical source. There are several types which use different operating mechanisms.
Solar powered flashlights can be used in remote locations where it is impossible to find any source of electricity except for solar power. [4] A built-in solar cell array in a hand-held product has a very small capacity. The light output and run time of the solar flashlight are limited by the amount of energy that can be absorbed in a day.
A solar lighter is a pocket-sized stainless steel parabolic mirror, shaped to concentrate sunlight on a small prong holding combustible material at the focal point. A revival of an old gadget marketed as a cigarette lighter by RadioShack in the 1980s, it is a useful hiking and camping accessory as its functioning is not affected by having been ...
Lighter fluid or lighter fuel may refer to: Butane, a highly flammable, colourless, easily liquefied gas used in gas-type lighters and butane torches; Naphtha, a volatile flammable liquid hydrocarbon mixture used in wick-type lighters and burners; Charcoal lighter fluid, an aliphatic petroleum solvent used in lighting charcoal in a barbecue grill
A garden solar lamp A child in Zambia studying by the light of a lamp charged by solar power during the day. A solar lamp, also known as a solar light or solar lantern, is a lighting system composed of an LED lamp, solar panels, battery, charge controller and there may also be an inverter.
Solar thermochemistry uses the heat of the sun directly to heat a receiver adjacent to the solar reactor where the thermochemical process is performed. In contrast, indirect processes have solar energy converted to another form of energy first (such as biomass or electricity) that can then be used to produce a fuel. Indirect processes have been ...
In solar cells which increase in efficiency due to light soaking a typical deformation (often referred to as an S or kink shape) is seen in the I-V curve before illumination. After illumination during some period, the short-circuit current density and open-circuit voltage go up resulting in a higher fill factor.
This planetary gear train consists of a sun gear (yellow), planet gears (blue) and carrier (green) inside a ring gear (red) An epicyclic gear train (also known as a planetary gearset) is a gear reduction assembly consisting of two gears mounted so that the center of one gear (the "planet") revolves around the center of the other (the "sun").