It will charge your Fitbit but my God it takes me up to 20 minutes to get it connected. Once connected it will fully charge under 30 minutes. I have literally had to stop and calm down for a couple of hours and try to connect again. I have also sat with it in my hands holding it while it charged so it wouldn't come unseated. **Warning, it's not charging if you don't see the battery charge indicator. It has to be going up in percentage to be charging