Off to the trash heap!

A nice idea that is undone by the poor quality. The batteries are a clamshell construction of some brittle plastic. Within a week the two halves had separated. This is likely to occur since when they are inserted into the heel of the insole, there is just a little indent to grab it with your finger, right along the seam. There would be a little tab that allows you to pull the battery out of the insole They replaced the defective pair and the same thing happened with the replacement. I tried to glue the batteries back together but they continue to split. It is also hard to tell if they are working. There is a little green light that flashes when turned on, but it is hidden when inserted. There have been times that one turns on and the other doesn't. Now I have four cracked batteries and no functioning insoles after spending nearly $100 With a better design, better engineering, better materials, and some quality control. this could be a good product. Until then, save your money

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