Sense 2: battery drains too fast, it works only on charger

[ACsense2]

My Sense 2 was working fine until 2 weeks ago. 
The battery started draining very quickly. From needing to charge every six days, to having to charge it every day. Then came the big red X on the screen. 
So, I restarted it, but the problem persisted. So, I did a factory reset, which required an update. 
Now, my Sense 2 goes off as soon as it is unplugged from the charger. 

Is there any fix for this? I am so sad and disappointed - it was not cheap, and it is only just over 1 year that I’ve had it.

Moderator edit: updated subject for clarity

[DavidFitbit]

Hi @ACsense2, welcome to  the Fitbit Community! It's great to have you here!

Let me help you with the issue of your Sense 2 which is not holding any charge. Thank you for the troubleshooting you have already tried.

If you were able to get rid of the red cross by factory resetting your smartwatch, you performed a troubleshooting very well.

If you feel the problem is related to the battery not charging, see our help article Why isn't my Fitbit device's battery charging?

[ACsense2]

Hi @DavidFitbit. Thank you for your prompt response and for the information regarding the battery. 

For now, it appears that the red cross is gone. However, the tips regarding the battery not charging do not appear to be rectifying the problem with my Sense 2. Can I please check, is there any other solution to fix this problem. It seems such a waste for it to die just like that when I remove the charger. Thank you.

[DavidFitbit]

Hi @ACsense2, Thank you for your response. I'm sorry to know the battery of your Sense 2 is not longer holding any charge.

At this point, my best recommendation is that you contact our customer service tech support. They have the most appropriate resources to thoroughly investigate your issue. I appreciate your time in this process.

[ACsense2]

Hi@DavidFitbit, ok thank you for the link to contact the customer service tech support. Hopefully they can help fix my Sense 2.