Backlight the Garrett AT Pro Metal Detector display?

In the morning and in the evening, it is sometimes hard to read the AT's display so after spending lots of time trying to back-light the AT Pro's LCD display to no avail, I gave up for now. Here is a simple and cheap way to do it that works great:

I got this clip-on book light at the local dollar store, they have a super bright LED and use three #357 batteries. It's fully adjustable and lasts a long time, just clip it on the arm strap, point it at the screen and you are all set.