Most Fitbits cannot be opened to replace the battery yourself—the devices are sealed and designed to be replaced as a whole when the battery fails.

Fitbit trackers use non-removable, built-in batteries that are glued or soldered into the device. Opening one yourself will almost certainly damage it beyond repair and will void any remaining warranty. The company does not sell replacement batteries for consumer use, and no official repair path exists to swap just the battery.

What you can do instead depends on how old your device is and whether it still works. If the battery no longer holds a charge, you have two realistic options: send the device to Fitbit for a replacement (which costs money), or buy a new tracker. If your device is still under warranty, Fitbit may replace it at no cost.

Key Takeaways

  • Fitbit batteries are sealed inside the device and cannot be removed or replaced by the user without destroying the tracker.
  • Fitbit does not sell replacement batteries or offer a battery-swap repair service for consumers.
  • If your battery no longer holds a charge, you can contact Fitbit support to request a replacement device, though this typically costs between $50 and $100 depending on the model.
  • Devices under warranty may may have access to for free replacement if the battery failure is a manufacturing defect rather than normal wear.
  • The typical lifespan of a Fitbit battery is three to five years, depending on the model and how often you charge it.

How Fitbit Batteries Are Built Into the Device

Fitbit trackers use small lithium-ion or lithium-polymer batteries that are permanently attached to the circuit board inside the casing. The battery is either glued down or soldered directly to the electronics, which means removing it requires tools and techniques that will damage the surrounding components. The device casing itself is also sealed—there are no user-accessible screws or panels.

This design choice is intentional. Sealed batteries allow Fitbit to make trackers smaller, lighter, and water-resistant. A removable battery would require a larger case, a removable back panel, and additional sealing mechanisms. The trade-off is that when the battery fails, the entire device becomes unusable.

What Happens If You Try to Open a Fitbit

If you attempt to pry open a Fitbit tracker, you will likely crack the plastic casing, damage the screen, or break the internal components. Even if you manage to open it without visible damage, the glue or solder holding the battery in place is difficult to remove without overheating the circuit board, which can destroy the electronics.

Opening the device also voids any warranty Fitbit may still honor. If you damage it in the process and then contact Fitbit support, they will not repair or replace it for free. You will be responsible for the full cost of a replacement device.

Contacting Fitbit for a Replacement Device

If your Fitbit battery no longer holds a charge and the device is no longer useful, you can contact Fitbit support through their website or app. Explain that the battery is not holding a charge and ask about replacement options. Fitbit will ask you to confirm the model, the date you purchased it, and whether you have tried basic troubleshooting steps like a full reset.

If your device is still under the one-year limited warranty and the battery failure appears to be a manufacturing defect (rather than normal wear after years of use), Fitbit may send you a replacement at no cost. If the device is out of warranty or the battery failure is considered normal wear, Fitbit will offer to sell you a replacement device at a discounted price, typically $50 to $100 depending on the model.

Fitbit support can be reached through the Fitbit app by going to Profile > [Your Device] > Help & Support, or through the Fitbit website at support.fitbit.com. Response times vary, but you should expect to hear back within a few business days.

How Long Fitbit Batteries Typically Last

The lifespan of a Fitbit battery depends on the model and how often you charge it. Most modern Fitbit trackers are rated to last between three and five years before the battery begins to hold less charge. Some models, like the Fitbit Inspire, are rated for up to five days per charge when new, while others like the Fitbit Charge may last four to five days per charge.

Battery degradation is normal. After two or three years of daily use, you may notice that your Fitbit needs to be charged more frequently than it did when new. This is not a defect—it is how lithium-ion batteries age. Once the battery can no longer hold enough charge to power the device through a full day, replacement becomes necessary.

Extending the Life of Your Fitbit Battery

You cannot prevent battery degradation entirely, but you can slow it down by following a few straightforward practices. Avoid letting the battery drain completely to zero regularly—charge it when it reaches 10 to 20 percent. Avoid exposing the device to extreme heat, which accelerates battery aging. If you will not be wearing your Fitbit for an extended period, store it in a cool place with a partial charge rather than fully drained.

Charging habits matter less than you might think. Modern Fitbit devices use smart charging that stops overcharging, so leaving your tracker plugged in overnight will not significantly damage the battery. What matters more is the total number of charge cycles over time—every full charge and discharge counts as one cycle, and batteries degrade with each cycle.

Alternatives If Replacement Cost Is a Concern

If the cost of a replacement Fitbit is more than you want to spend, you have a few options. You can continue wearing your current device even if it needs charging more frequently—it will still track your steps and activity, just with shorter battery life. You can also look for refurbished or open-box Fitbit models, which are often available at a discount through retailers like Amazon or Best Buy.

Another option is to explore fitness trackers from other brands that may have user-replaceable batteries or lower replacement costs. Some smartwatches and fitness trackers from other manufacturers do allow battery replacement, though this is becoming less common across the industry as devices get smaller and more integrated.

Frequently Asked Questions

Can I replace just the battery if I take my Fitbit to a repair shop?

Most third-party repair shops will not attempt to replace a Fitbit battery because the device is sealed and the battery is soldered to the circuit board. Even if a shop agrees to try, the cost will likely be close to or exceed the price of a new device, and the repair may damage other components. Fitbit does not authorize third-party repairs, so you would have no warranty on the work.

Is there a way to reset my Fitbit if the battery is draining too fast?

Yes, a full reset sometimes helps if the battery is draining faster than normal due to a software issue. In the Fitbit app, go to Profile > [Your Device] > About and select "Clear User Data" or "Factory Reset" depending on your model. This will erase all data on the device, so sync first. If the battery drain continues after a reset, the battery itself is likely degraded and needs replacement.

How much does it cost to get a replacement Fitbit from the company?

Fitbit replacement costs vary by model. Older or basic models like the Inspire typically cost $50 to $70 to replace, while newer or more advanced models like the Sense or Charge may cost $100 or more. Fitbit may also offer a discount on a newer model if you are replacing an older device. Ask Fitbit support for the exact price for your specific model.

What should I do with my old Fitbit if I get a replacement?

You can recycle your old Fitbit through Fitbit's recycling program or through a local electronics recycling facility. Fitbit's website has information on how to mail in old devices for recycling. Do not throw it in the trash, as the battery and electronics contain materials that should be handled properly.