Most Fitbits cannot be opened to replace the battery yourself
Most Fitbit models are sealed units — the battery is glued or welded inside the case, and opening one will break the waterproof seal and void any warranty. Fitbit does not sell replacement batteries for consumer use, and the company does not provide instructions for battery replacement because it is not designed as a user-serviceable repair.
If your Fitbit no longer holds a charge, your options are limited to sending it back to Fitbit for service, buying a replacement device, or in some cases finding a third-party repair shop. The path you choose depends on how old your device is, whether it is still under warranty, and whether the cost of repair makes sense compared to a new purchase.
Key Takeaways
- Fitbit batteries are sealed inside the device and cannot be replaced by the user without breaking the waterproof design.
- Fitbit offers a mail-in battery replacement service for devices still under the one-year limited warranty, though you will need proof of purchase.
- Out-of-warranty replacements through Fitbit typically cost between $50 and $100 depending on the model, plus shipping.
- Third-party repair shops can sometimes replace Fitbit batteries for less money, but this voids any remaining warranty and may damage the device.
- If your Fitbit is more than two years old, the cost of battery replacement often approaches or exceeds the price of a new entry-level model.
Sending your Fitbit to Fitbit for battery replacement
Fitbit's official path for a dead battery is to contact Fitbit Support through the Fitbit app or the Fitbit website. You will need the serial number of your device (found in the app under device settings) and proof that you own it — usually your original receipt or order confirmation email.
If your device is within the one-year limited warranty period, Fitbit will replace the battery at no cost. You pay only for return shipping. If the device is out of warranty, Fitbit will quote you a repair fee before you send it in. The fee varies by model — older or less expensive trackers may cost $50 to $70 to repair, while newer or premium models can run $80 to $100 or more.
The entire process typically takes two to three weeks from the time you ship the device until it arrives back. Fitbit will send you a prepaid shipping label, so you do not pay to send it in — only to have it returned. During this time you will not have access to your tracker.
What to expect when you contact Fitbit Support
Start by opening the Fitbit app and navigating to your device settings. At the bottom of the device page, you will see a "Get Help" or "Contact Support" option. Select it and describe the problem — that the battery no longer charges or holds a charge. Fitbit Support will ask you to confirm the model, the serial number, and when you purchased it.
If you are within the warranty window, they will send you a prepaid shipping label when ready. If you are out of warranty, they will provide a quote for the repair cost. You can accept or decline at that point. If you accept, you will receive the shipping label and instructions for packing the device.
Pack the Fitbit securely in a small box or padded envelope. Do not include the charger unless Fitbit specifically asks you to. Drop it at any UPS, FedEx, or postal location. Keep your tracking number so you can monitor the shipment.
Third-party repair shops and battery replacement
Some independent electronics repair shops will replace a Fitbit battery for $30 to $60, which is less than Fitbit's out-of-warranty fee. However, opening the device to access the battery will damage the waterproof seal, meaning your tracker will no longer be water-resistant. If you swim or shower with your Fitbit, this is a serious drawback.
Additionally, any repair done outside of Fitbit voids the remaining warranty. If something else fails on the device shortly after a third-party battery replacement, Fitbit will not cover it. Before choosing a third-party shop, ask whether they can reseal the device with a waterproof adhesive and what their warranty is on the repair itself.
To find a repair shop near you, search online for "electronics repair near me" or "Fitbit repair [your city]". Call ahead and ask specifically whether they have replaced Fitbit batteries before and what their process is for resealing the device.
Comparing the cost of repair versus replacement
Before you commit to a battery replacement, compare the repair cost to the price of a new Fitbit. Entry-level trackers like the Fitbit Inspire or Fitbit Charge models start around $80 to $100. If your device is more than two years old and the repair cost is $70 or higher, a new device may be the better financial choice — you will get current software, new features, and a full warranty.
If your Fitbit is less than a year old and still under warranty, battery replacement is free (minus return shipping), so repair is clearly the right choice. If it is one to two years old and out of warranty, the decision depends on how much you value keeping the same device and whether you want to continue using that model.
How to extend your current Fitbit's battery life
If your Fitbit is still holding a charge but the battery drains faster than it used to, you may be able to extend its life before replacement becomes necessary. Reduce the screen brightness in the device settings, turn off continuous heart rate monitoring if your model has it, and disable notifications for apps you do not need. Sync your device less frequently — daily syncing is enough for most users.
Keep your Fitbit away from extreme heat and cold, which degrades battery performance. Do not leave it in a hot car or in direct sunlight for long periods. If you are not using your Fitbit for several weeks, charge it fully and store it in a cool, dry place. These steps will not restore a dead battery, but they can slow the decline of a weakening one.
Frequently Asked Questions
Can I replace a Fitbit battery myself?
No. Fitbit devices are sealed and glued shut. Opening one will break the waterproof seal and void the warranty. The battery is not designed to be user-replaceable, and Fitbit does not sell batteries or provide instructions for replacement.
How long does a Fitbit battery last before it needs replacement?
Most Fitbit batteries last three to five years with normal use. Older models or devices used heavily may need replacement sooner. Battery life depends on how often you charge, the age of the device, and how many features you use.
What happens if I send my Fitbit in for repair and it is not the battery?
Fitbit Support will diagnose the issue before charging you. If the problem is something other than the battery, they will tell you the repair cost for that specific issue. You can choose to proceed or decline. You only pay if you approve the repair.
Is it worth repairing a five-year-old Fitbit?
Probably not. A five-year-old Fitbit is out of warranty, and the repair cost ($70–$100) is close to or exceeds the price of a new entry-level model. A new device will have current software, better features, and a full warranty. Repair makes more sense for devices less than three years old.
Will a third-party repair shop's battery replacement work as well as Fitbit's?
The battery itself will work the same way, but the device will lose its waterproof rating because the seal must be broken to access the battery. Some shops can reseal it with waterproof adhesive, but this is not as reliable as the original seal. Ask the shop about their resealing process and warranty before proceeding.