Don't drain your phone's battery, use dedicated lights instead. USB rechargeable flashlights can draw power from battery banks, portable power stations, generators, and or even a car. Solar-powered ...

The video starts with a teardown of the original light, which was a flexible affair meant to plug directly into a USB port. [Tilma] found that the reason it failed was because of a broken solder ...

With a USB-powered lamp and a spare AA battery pack kicking around, [edyb] decided to make his own. First, the USB lamp was disassembled, luckily the LEDs were already laid out in a ring shape.