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2. Solar-powered flashlight - Wikipedia

   en.wikipedia.org/wiki/Solar-powered_flashlight

   A typical solar flashlight can give useful levels of illumination on objects up to 50 metres away, and beam may be visible for much longer distances. The solar cells used for battery charging have an indefinite life expectancy. A solar powered flashlight may give several hours of light after being charged during the day. [3]

3. Flashlight - Wikipedia

   en.wikipedia.org/wiki/Flashlight

   Left to right: 3x AA to D parallel battery converter with rechargeable NiMH AA-size batteries inserted. MY DAY vintage flashlight. It uses 1.5 V D-size batteries. Sofirn SP36 flashlight. It features a 5 V 2 A USB-C charging port to load 3.7 V 18650 rechargeable lithium-ion batteries. The most common power source for flashlights is the battery.

4. Mechanically powered flashlight - Wikipedia

   en.wikipedia.org/.../Mechanically_powered_flashlight

   They may also include alternative means of charging the battery, such as an AC adaptor, solar cells, or cords that plug into a cigarette lighter socket in a car. Crank powered flashlights often have radios and other features. One popular feature is a 5-volt USB charging port for recharging cell phones when an outlet is

5. List of battery sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_battery_sizes

   Also used in larger, high-powered LED flashlights and some electronic cigarettes. This size is sometimes used in devices that can take either one 26650 or three AAA cells in series in a cylindrical 3-cell battery carrier. 26700: 4,000-5,000 26: 70 LiFePO4 cells. 26800: 5,500–6,800 [229] 26 80 A larger format for e-bikes and transport.

6. Solar charger - Wikipedia

   en.wikipedia.org/wiki/Solar_charger

   Portable solar chargers are used to charge cell phones and other small electronic devices on the go. Chargers on the market today use various types of solar panels, ranging from thin film panels with efficiencies from 7-15% (amorphous silicon around 7%, CIGS closer to 15%), to the slightly more efficient monocrystalline panels which offer efficiencies up to 18%.

7. Olight - Wikipedia

   en.wikipedia.org/wiki/Olight

   Olight is a flashlight brand [4] that was founded in 2007 by Fox Fan. [5] The brand is headquartered in Taiwan, [6] and has operations in Georgia, United States. [7] Olight specializes in the production of flashlights, [8] including LED flashlights, [9] survival lights, [10] and tactical flashlights. [11] In addition, it also produces headlamps ...