I gave my wife a FitBit Charge 3 for a gift. It did fine for about 4 months, then it wouldn't hold a charge for more than an hour. I contacted their support and got the run around. Kept telling me I wasn't charging it correctly, or doing numerous testing to no avail. I sent them screenshots to show how fast a 100% charge would run totally out. They just kept giving me the run around. They would just not seem willing to give me a RMA so I could send it in for a swap or repair. I obviously got a lemon, because my personal Charge 3 has functioned as expected continuously for over 2 years. I won't be buying anything else from them.