These are pretty good chases but as other reviewers have described them well I will briefly describe how to change the batteries. I was also looking for instructions but couldn't find them so I went and made my own. You will need: a small pair of sharp tweezers, a metal paper clip, 2 button batteries LR41. Headlight and rear only with magnets. You won't need the backing, so set it aside. 1) On the back of the main unit, use tweezers to slowly pull out the plastic cover where you turn on/off the LED. Slowly lift it up until you see two batteries. You don't have to pull the plastic cover all the way out. 2) The batteries are held together by several metal tabs. You'll need to use your pointy tweezers to pry up one of the ledges to release the battery. Yes, it's really small, so do it carefully. You only have to lift it up just enough to remove the battery, you don't have to remove it completely. 3) Use a small paper clip (or a micro screwdriver if you have one) to pry the battery out. Insert a new one. 4) Repeat steps 2-3 for the second battery. 5) Close the plastic cover and turn it on. Hope that helps. I
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