Convert a flashlight to a lithium Li-Ion battery
Convert a flashlight to a lithium battery with your own hands at home. Li-ion 18650, 18400, 17350, 13400, 3.7 volts. Take it and do it. Do-it-yourself emergency lighting from scrap materials. Convert a flashlight from batteries to lithium batteries with your own hands. From a simple flashlight, if you have the desire, you can even make electric shocks or a device that will scare away wild animals. How to power a flashlight from an electronic cigarette.