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2. Need to Work in the Dark? Turn to One of These Editor ... - AOL

   www.aol.com/done-dark-turn-one-rechargeable...

   Best Overall: ThruNite TC15 V3 2403 High Lumen Rechargeable Flashlight. Best Value: Anker Bolder LC40 Rechargeable Flashlight. Best Tactical: Fenix PD36R Rechargeable Flashlight. Highest Battery ...

3. Solar-powered flashlight - Wikipedia

   en.wikipedia.org/wiki/Solar-powered_flashlight

   Solar powered flashlights vary in features and capabilities. 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.

4. Charge cycle - Wikipedia

   en.wikipedia.org/wiki/Charge_cycle

   Each battery is affected differently by charge cycles. [2] [3] In general, number of cycles for a rechargeable battery (the cycle life) indicates how many times it can undergo the process of complete charging and discharging until failure or starting to lose capacity. [4] [5] [6] [7]

5. Comparison of commercial battery types - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_commercial...

   Rechargeable alkaline: RAM KOH Yes 1992 [14] 0.9 [15] 1.57 [15] 1.6 [15] <1 [14] Silver-oxide: SR NaOH/ KOH Silver oxide: No 1960 [16] 1.2 [17] 1.55 [17] 1.6 [18] 0.47 (130) [18] 1.8 (500) [18] Nickel–zinc: NiZn KOH Nickel oxide hydroxide: Yes 2009 [14] 0.9 [14] 1.65 [14] 1.85 [14] 13 [14] Nickel–iron: NiFe Iron: KOH Yes 1901 [19] 0.75 [20 ...

6. Flashlight - Wikipedia

   en.wikipedia.org/wiki/Flashlight

   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.

7. Mechanically powered flashlight - Wikipedia

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

   The best designs use a supercapacitor instead of a rechargeable battery, since these have a longer working life than a battery. This, along with the long-life light-emitting diode which does not burn out like an incandescent bulb, give the flashlight a long lifetime, making it a useful emergency light. A disadvantage of many current models is ...