This handy invention is sure to find its way into every household due to its simplicity and usefulness. A 3-LED unit simply attaches to the end of a 9-Volt battery to provide light when you need it. This would be great for emergency kits. I've seen something similar but, it didn't have an on/off switch like this one.
Implications - The handyman sure has it easy these days, with all the latest gadgets making repairs easier than ever. Products like the Panasonic flashlight make looking in dark corners a lot easier and there are more like it coming out. This will benefit mechanics and other blue collar workers due to its convenience.