Here's how to mash-up a digital camera rechargeable battery with LED safety glasses.
Awhile back, I bought a pair of those clip on LED lights that attach to the arms of glasses. At first, they worked great. But after a few hours of use, the button batteries slowly died to a point that they became useless. Continually replacing button batteries, (mine had three per each light) wasn't very economical.
I had an old Canon S100 digital camera in my junk pile, (the LCD was broken). I also kept the battery charger and two Li-ion 3.6V batteries. I figured I could use the Li-ion batteries to power the LEDs.
Hot glue gun
Clip-on LED lights - Electronic Goldmine - G16248 - $2.95http://www.goldmine-elec-products.com/prodinfo.asp?number=G16248
Tic Tac container
Double sided tape
1/8" foam rubber
Can of Brain Toniq