Ordered these in June 2017. And I really love how I can match watch with outfit. Color coordinating, so to speak. But now, I tried to replace battery for the dead ones. Unfortunately, it's harder than I thought. The winding knob fell off. So, the red color is gone. To me that means, once dead, forever dead. Don't bother replacing the battery. Maybe the seller can post a youtube video on how to replace the battery.