Skip to main content

Smart fitness watch via Bluetooth, released in March 2016. Model: FB502SBUL

52 Questions View all

Could I replace the battery?

My Fitbit Blaze battery only lasts 10-12 hours. Is it possible to change the battery? If so where can I find a replacement battery? I know it uses a 167 mAh Lithium Ion Battery. I'm not having any luck finding one. The battery has never worked right. Fitbit sent me a replacement pebble. I'd still like to attempt to fix this one.

Answer this question I have this problem too

Is this a good question?

Score 5

Has anyone found any battery replacement valid for Blaze?


I replaced my Blaze battery with this one from Amazon:

Fitbit Blaze Smartwatch Battery (Li-Pol, 3.7V, 120mAh) Replacement for Fitbit Blaze Smartwatch Battery

It's been about 2 months now and I am very happy. A charge lasts for about 3 days now.


Add a comment

2 Answers

Most Helpful Answer

Here’s where to get the battery:

Fitbit Blaze Battery

Here’s how to install it:

Fitbit Blaze Battery Replacement

Fitbit Blaze Battery Image


Fitbit Blaze Battery


Was this answer helpful?

Score 2
Add a comment

You should disassembly it and then check for it's battery and then you can buy a new replacement .

Was this answer helpful?

Score 0


@acnologia how do you disassemble it and where can one get a new battery?


There's a video on YouTube how to disassemble. The where to get the battery is the real question I've looked haven't had luck. The battery is a 167 mAh lithium ion battery. Good luck let me know if you find one.


@oldturkey03 It's easy ,just use YouTube ,i have seen guides that do it really fast.


Anybody know the dimensions of the battery? There are a lot of 3.7v rechargeable batteries on AliExpress


The battery for the Fitbit Blaze is 3.2mm X 18mm X 30mm. 3.7V, If it's more than about 31 or 32 mm long, the new battery won't fit, so be careful.


Add a comment

Add your answer

Tracy Kirkpatrick will be eternally grateful.
View Statistics:

Past 24 Hours: 0

Past 7 Days: 1

Past 30 Days: 3

All Time: 9,844