Most commercial LED flashlightsuse three AAA or AA batteriesin series that produce 4.5V. The batteriesthen drive four white LEDs that connectin parallel. These LEDs can workat voltages as low as 2.7V ...

Who would’ve thought a cheap AliExpress emergency light could be packed with such ... A detailed analysis by [BigCliveDotCom] reveals a smart circuit that defies its humble price.

The custom battery is paired with a simple LED flashlight circuit in its own 3D-printed housing. The idea is that when a blackout strikes, you can assemble the LED flashlight with your custom ...