I was about to give these batteries a bad rating because they would only last a few days in a vivofit jr, but then I thought I should verify that it was indeed the batteries that were the problem and not the watch. I happened to have a second vivofit to try them in, and they worked fine in it. Then I took apart the first watch and found some corrosion on a few of the pins. After scraping away the corrosion, the watch worked just fine with these batteries.
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