Name: Fitbit FB521 battery
Brand: Fitbit
SKU: 25BA0106_Wat_Oth
Price: 29.76 SGD
Availability: InStock
Rating: 4.4 (89 reviews)

Description Shipping & Payment Warranty Help zone

High-Performance replacement battery for Fitbit FB521, Grade A cells

The replacement battery for Fitbit FB521 from Batteryboss.net will be your best choice. We offer a high-quality battery at a more reasonable price. Our Fitbit FB521 batteries can be charged/discharged for at least 600 cycles. Being made of ABS plastic case and the original IC protection chip, it could give you the new experience of excellent durability.

With first-class quality assurance, the battery for Fitbit FB521 provides protections of voltage, short circuit, charging time, ESD, and so on. Each Fitbit FB521 battery has passed a series of safety certifications, such as CE, UL, ROHS, ISO9001/9002. It will be rigorously tested by our technicians before being shipped to your hands. We will try our best to select a high-quality Fitbit Sense 2 battery for you.

In addition, we provide 30-Day Money Back Guarantee and a One-Year Warranty for you. If you have any dissatisfaction after receiving the battery for Fitbit FB521, you can click the link to find more details about our Returns and Warranty service. Please rest assured to purchase from us!

Compatible Part Numbers

FB521

Compatible Model Numbers

for Fitbit Sense 2
for Fitbit Versa 4 Fitness Smartwatch

Multiple Security Protection

Warning About The Fitbit FB521 Batteries

If your capacity drops faster than you think, it means you should treat your Smart Watch Battery in time. Do not leave your Fitbit battery FB521 dormant for long periods. We recommend using the battery at least once every two to three weeks. It's a good idea to store the laptop part in a dry and cold place if it is not used. Clean the battery's metal contacts with rubbing alcohol on a damp cloth. Clean contacts increase energy efficiency. Turn off the wireless devices. This will save the Fitbit FB521 battery replacement power. Batteries degrade more quickly when they’re hot.

Tags:FB521 battery equivalent,FB521 battery model name, FB521 model, FB521 model name, Fitbit FB521 model name,Fitbit Sense 2 battery replacement,Fitbit Sense 2 battery model number, FB521 battery 162mAh,FB521 battery, Fitbit FB521 battery replacement, replacement battery for Fitbit Sense 2

Shipment Methods

Currently, all of our shipments are through Priority Mail (EMS USPS),if you are dealer,you can selected others .We can not offer Overnight (UPS Red) and 2nd Day Delivery (UPS Blue) .

Shipping & Handling

Free Shipping on All Products

All orders placed for Standard Shipping on all stock items will be shipped within 1 - 2 business days.

Estimated Delivery Time:3 - 7 Business Days

It is very easy for you to check the status of your order and locate the package during transit, as an email with a tracking number will be sent to your email address after your order has been shipped out. Tracking number will be emailed to buyer once your ordered item is shipped out.

Shipping rates: Our rates include the expenses of shipping, handling and the high quality packaging.

Attention: Priority mail will be used for all PO Box shipping addresses ,But All APO's and military addresses do not apply here. Please use standard shipping for these. Thank you.

Payment Methods

1-Year Warranty

We offer 12 months warranty on the replacement Fitbit FB521 battery! During this period, if your battery fails due to quality problems, we will replace your battery with a new one.

30-Day Money Back Guarantee

The new Fitbit Sense 2 battery should be charged fully and discharged to lower 5-10% for 5-6 times for normally perform. Traditional 7-Day Money Back Guarantee cannot meet test needs enough. To this end, we extend the warranty from 7-day to 30 days.

100% Security Payment

Your privacy and security of information are of the utmost importance here at Batteryboss.net. We have taken all the necessary steps to ensure that your shopping experience with us is 100% safe and secure. Buy Fitbit Sense 2 battery replacement with confidence!

The capacity of the purchased Fitbit FB521 battery shows 0% and can’t be charged?

Check the Fitbit FB521 replacement battery to see if the wiring is loose or the connection is not firm.

If the circuit is normal, please check whether the battery adapter can work normally or not.

If the circuit is normal and the charger is good, the issue may be that the circuit board inside the computer is faulty, check the method: replace the original battery to confirm whether it can work normally or check it in the local laptop repair shop.

If the situation above has been checked while the battery still can not charge, the issue may be caused by the Fitbit Sense 2 battery. Please contact us and we will solve it for you.

What's the difference between a 3-cell, 6-cell, 9-cell Acer battery?

The difference between those batteries is the duration. The more the cell is, the longer duration the battery will last. Meanwhile, the size of the battery will be larger. If you consider the duration of the battery most, you can choose a battery with more cells, but the bottom will protrude and the weight of the laptop will increase under these circumstances.

How to maintain the Fitbit FB521 battery?

It is recommended that you fully charge and discharge the Fitbit FB521 replacement battery at least once a month to keep the electrons flowing inside the battery, especially for those who use laptops frequently for a long time. You can also optimize battery performance by changing certain settings on your notebook. For example, turn off unnecessary devices and unused functions, such as Bluetooth and Wi-Fi, and dim the screen brightness to a comfortable level when using the notebook.