I purchased a JayBird X2 headset for about $180 in 2016. After using them for no more than 20 times, the device failed. It would ONLY power on just after taking the headset off the charger. I had been turning the headset ON and OFF each time I needed it. My son came up with the solution. He told me to keep the headset ON all the time! In short, this was the near perfect solution. He said the battery drain was minimal, so why not keep them ON all the time? I just carried the headset around until I needed it and linked it to my cell phone. This worked very well for me as I only use the headsets when I go to the gym or take a walk outside with my wife and friends on the weekend. Soon as I get home with, I put the headsets back on the charger.
This was not a perfect solution because the JayBird would disconnect from my Samsung Galaxy S5 some times. I never had a disconnect problem between the phone and our RAV4 car so I suspect the headsets were at fault. If you have this problem, just go to your phone Settings and select Bluetooth. Make sure that Bluetooth is turned ON. Look at the Paired Devices list and you should see Jaybird X2. Finger select that device but not the gear symbol to the right. By finger tapping that headset you are telling the phone to pair up to the headset.
CAUTION: I found that I had to turn Bluetooth OFF on my cell phone to get the phone speaker and microphone to work without the Jaybird. The reason is that the phone expects all communications to take place through that Jaybird if the phone and headset are paired. The phone speaker and microphone will be turned off. If you are NOT using the Jaybird, the phone will act dead if Bluetooth is ON. Just turn Bluetooth off and the normal phone audio should work. To make this all simple, just go to the phone and turn Bluetooth ON when using the headsets and OFF when not.
Update: 2018 I switched to an LG V30 cell phone. The Jaybird X2 also shows problems connecting to my new cell phone. It times, I need to turn off my cell phone Bluetooth and/or turn off and on my cell phone to get the headsets to connect. This process is a pain.
Update: I typically leave my Jaybird X2 headsets sitting behind my neck. One day I completely forgot to take care of them and they ended up in my wash. The headsets were washed and dried. When I removed them from the dryer they worked! The only down side was that the foam ear attachments that slip on each ear piece dissolved.
Revised April 7, 2018