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  • Portable Sun - Rechargeable Work Lamp

    Could you make a version with an 18650-based battery instead of an SLA? You can get quite a significant weight reduction that way.

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  • Make a $200 "tactical" flashlight for about $15

    The "LumiTact G700" is a scam. It's really an Alonefire E17c G700, a 6-dollar Chinese flashlight. The LED inside is the few-years old Cree XM-L T6 (and some people even reported receiving a fake of that LED, called the Lattice Bright XML-T6).If you want a similar, but better quality zooming light, get the Brinyte B158 for about $30. If you don't need the zoom function, but want longer throw, buy one of the Convoy lights. Both of these come with the newer XM-L2 U3 or U4 LED, which is somewhat brighter, and far more efficient.Keep in mind that the Brinyte doesn't come with a 3xAAA adapter, and thus can only be used with an 18650-type battery (not sure about the Convoy). Even if you end up buying a light with the 3xAAA holder, it's better to run it from an 18650, as only then wil...

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    The "LumiTact G700" is a scam. It's really an Alonefire E17c G700, a 6-dollar Chinese flashlight. The LED inside is the few-years old Cree XM-L T6 (and some people even reported receiving a fake of that LED, called the Lattice Bright XML-T6).If you want a similar, but better quality zooming light, get the Brinyte B158 for about $30. If you don't need the zoom function, but want longer throw, buy one of the Convoy lights. Both of these come with the newer XM-L2 U3 or U4 LED, which is somewhat brighter, and far more efficient.Keep in mind that the Brinyte doesn't come with a 3xAAA adapter, and thus can only be used with an 18650-type battery (not sure about the Convoy). Even if you end up buying a light with the 3xAAA holder, it's better to run it from an 18650, as only then will you get the full brightness. Brinyte makes a special 18650 with a built-in Micro-USB port, which can be charged using your phone's charger. Alternatively, you can get 18650s from old laptop batteries, in which case you'll need an external Li-ion charger.

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