Penlight
From Wikipedia, a free encyclopedia written in simple English for easy reading.
A penlight is a small flashlight shaped like a pen.
Almost all the time, a penlight is made up of a small light known as an "LED" (Light Emiting Diode) but can also use small lightbulb made just for small flashlights.
The LED lights up when power is run through its two contacts. Making the penlight light up is as simple as pressing a button, or screwing the end on tighter so it makes contact with the batteries.
Most of the time, penlights use two or three AAA or AAAA batteries. AAAA are a newer, thinner type of battery, most commonly found in small electronics.
Penlights can be made out of plastic or metal, and can be any color. They most often have a little clip, to hold it on your shirt or something.