FB521 Replacement Battery for Fitbit Sense 2

FITBIT | SKU: 25BA0106_Wat_Oth

FB521 Replacement Battery for Fitbit Sense 2 (162mAh)

$21,88

( Free Shipping* )

If your Fitbit Sense 2 is no longer holding a charge as well as it used to, or if it is swelling, it may be time to replace the battery. This battery is a great option for restoring your Fitbit Sense 2 to its original performance.

Fast & Free Delivery
Easy 30 Day Return Policy
12-Month Warranty
Secure online payments

Capacity:

162mAh

Voltage:

3.87V

Battery Type:

Li-ion

Model:

FB521

Compatibility:

Fitbit Sense 2

Fitbit Sense 2 — 3.87V Li-ion Replacement Battery (FB521)

If your Fitbit Sense 2 is draining fast or barely lasting half a day, this high-quality FB521 replacement battery brings back the power you're used to.
Built-in protection against overcharging and short circuits
Matches original voltage and capacity specifications
Backed by a 12-month warranty

Replaces the following parts

FB521

Compatible with the Following Devices

for Fitbit Sense 2
for Fitbit Versa 4 Fitness Smartwatch

Compatibility Note: Please check your original Battery model before ordering. Professional installation recommended.

What's in the Box

1x high-quality replacement battery for Fitbit Sense 2 (FB521, 162mAh )

Fitbit Sense 2 Battery Specifications:

Condition	New
Capacity	162mAh
Voltage	3.87V
Battery Type	Li-ion
Model:	FB521
Compatibility:	Fitbit Sense 2
Certifications	CE, RoHS, UL
Protection Functions	Overcharge, Deep Discharge, Overvoltage, Overcurrent, Short Circuit
Warranty	12 Months

Upgrade your Fitbit Sense 2 with a high-quality replacement Battery and enjoy improved performance and longer usage time.

Battery Care Tips

Getting Started
Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.
Keep It Healthy
Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Shipping policy

We strive to ensure that your order arrives quickly, safely, and on time.

Free Worldwide Shipping

We offer FREE shipping on all orders.

Processing Times

Orders are generally processed and shipped from our facility within 1-2 business day (excluding weekends and holidays).

Delivery Times

Once shipped, orders typically arrive within 7–15 business days within the contiguous United States, depending on the shipping method and destination.

Please note: These are estimated delivery times. Actual delivery may be affected by customs clearance, weather, or other unforeseen circumstances. We appreciate your patience and understanding.

Tracking Information

When your order has shipped, you will receive an email informing you of your package being shipped along with a tracking number. If for any reason you don't receive this or for more shipping information, please contact us along with your order number.

Please note, tracking can take around 24---48 hours to update after dispatch.

Important Information

We are not responsible for incorrect addresses entered by the customer.

Payment policy

My Battery Parts accepts payments by any of the following methods:
Visa, MasterCard, American Express, and Discover Credit and Debit Cards, Google Pay and PayPal.