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2. Mechanically powered flashlight - Wikipedia

   en.wikipedia.org/wiki/Mechanically_powered...

   However it may be less reliable as an emergency light, because the rechargeable battery it contains eventually wears out. The lithium-ion cells used are typically rated for around 500 charges. In an alternative "Clockwork Torch" design, produced by Freeplay Energy , the energy is mechanically stored in a flat spiral wound mainspring , rather ...

3. Solar-powered flashlight - Wikipedia

   en.wikipedia.org/wiki/Solar-powered_flashlight

   Solar powered lights need not be manually recharged as in the case of conventional battery operated flashlights. [3] Pollution from discarded batteries used in normal flashlights is eliminated. [4] Solar powered flashlights can be used in remote locations where it is impossible to find any source of electricity except for solar power. [4]

4. Flashlight - Wikipedia

   en.wikipedia.org/wiki/Flashlight

   A set of modern LED flashlights. A flashlight or electric torch (Commonwealth English), usually shortened to torch, is a portable hand-held electric lamp.Formerly, the light source typically was a miniature incandescent light bulb, but these have been displaced by light-emitting diodes (LEDs) since the early 2000s.

5. Backup battery - Wikipedia

   en.wikipedia.org/wiki/Backup_battery

   A valve-regulated lead-acid battery is a battery type that is popular in telecommunications network environments as a reliable backup power source. VRLA batteries are used in the outside plant at locations such as Controlled Environmental Vaults (CEVs), Electronic Equipment Enclosures (EEEs), and huts, and in uncontrolled structures such as ...

6. Bardic lamp - Wikipedia

   en.wikipedia.org/wiki/Bardic_lamp

   The Bardic Rail Signalling Lamp was the original name of a particular type of battery powered railway signalling handlamp made from 1962 by Bardic, Ltd. [1] for use by rail and trackside workers. It became the standard battery operated handlamp in use on British Rail , replacing oil-lit lamps.

7. Torch - Wikipedia

   en.wikipedia.org/wiki/Torch

   A burning torch, discarded on the road in the wake of the Lewes Bonfire Night celebrations. A torch is a stick with combustible material at one end which can be used as a light source or to set something on fire. [1] Torches have been used throughout history, and are still used in processions, symbolic and religious events, and in juggling ...