This Design Idea describes a high-intensity, rechargeable flashlight system that you can build from a 6V lantern-type flashlight. The rechargeable battery comprises four 2V, 2.5-Ahr (ampere-hour) SLA ...

According to its creators, not only can the ZeroHour XD tactical flashlight blast 1,000 lumens of light into the evening darkness for up to six hours, it can charge an iPhone seven times (though it ...

Panasonic has developed the “ultimate disaster survival flashlight,” called Any Battery Light. As the name suggests, this flashlight can run on any common battery you find lying around, regardless of ...

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