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Sense 2 not charging properly

‎07-09-2025 01:49 - last edited on ‎07-09-2025 18:30 by Fitbit Moderator

‎07-09-2025 01:49 - last edited on ‎07-09-2025 18:30 by Fitbit Moderator

I have recently bought a second hand Sense 2 which I was told had a battery life of 4-5 days. When I plug it it quickly gets to 100% but then on unplugging it drops straight down to 71%. Any thoughts? Is it that it hasn’t reached 100% in the first place? 

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‎07-09-2025 18:28 - edited ‎07-09-2025 18:29

‎07-09-2025 18:28 - edited ‎07-09-2025 18:29

Hey there @ClareJacko, welcome to the Fitbit Community! 

Thanks a lot for taking the time to share this situation with us; all your effort is really appreciated!

Please let me suggest some troubleshooting steps. This issue seems to be related to the battery not charging correctly. Keep in mind that this could have several reasons; an incorrect power source might have been used. For example, one of those superchargers that has 120W of power. Try using your computer's USB port instead.

You can see more steps here.

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