DEVMO Mini Handy 2~150mA LED Tester Test Box for Light-Emitting Diode Bulb Lamp

hi everyone I'm going to show you a real easy way today to test your LEDs that you might have floating around or in your electronics box and instead of trying to take two double-a batteries to hook them up and touch it real quick before the LED burns out there's much easier way yeah most people ain't gonna recognize that it says right on it lithium battery inside it's just a little holder one of those little watch cells this one's a cr2025 bought cr2032 is a tons from model numbers any of them you can use to safely test an LED without blowing it without having a resistor in because these batteries cannot put out that much current now that stands true for like white or blue LEDs that usually need at least three volts to run the lower voltage LEDs like green amber red you can plug them in for a few seconds just make sure the LED works pull back out you're not going to do any damage to the