Trade in your old chemical glow sticks for the Life Gear LED Reusable Glow Sticks. These LED Glow Sticks can be twisted on and off for up to 20 hours of run time. Chemical glow sticks can only be used one time and the light starts to dull while in use. Stop throwing away your money and use LED Glow sticks for multiple uses. These LED glow sticks include 3xAG13 batteries which can be replaced after the 20 hours of use. These fun lights are water resistant. Use in the dark to mark your tent, stick to you back pack to be seen or just have fun in the yard.