How about a light as an accessory on a cell phone. You would press a button on the side of the phone and the light would go on, thereby allowing you to read a menu, a show program, or see your key hole at home or at your car in the dark. I know that many cell phones have "lighted" faces, but it's not enough light and is not easy to direct it to an area to help you see in the dark. This light would run on the cell telephone battery. This would be a very simple addition, and would be very helpful.
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