Tips Before Purchase

Please confirm the compatible model and battery part number carefully before you purchase it.

If you are not sure, please send email to us with your battery details or pictures, we will give you professional suggestions.

Product Specifications

- Battery Capacity: 100mAh

- Battery Type:

- Voltage Output: 3.85V

- Watt-hour:16.11Wh

COMPATIBLE MODELS

-for Fitbit Charge 5 Fitness Smartwatch FB421

FAQ after installation

Q1. Why battery connector does not fit?

A1: Please confirm if you have bought and received wrong model battery. Check the model number on the of your phone.

Q2. Why phone can’t turn on?

A2: Make sure battery connector was connected correctly and Charging the phone for 15 minutes with original charger and cable. The charging needs to be charged to 5% before it can be turned on normally, If battery have exhausted battery power.

Q3. Why battery won’t charge?

A3: Maybe bad connect. Reopen your phone and reconnect the battery connector to logic board socket. Make sure battery connector connects well.

LSS271617 Battery,2025 New Upgraded Replacement Battery for Fitbit Charge 5 Fitness Smartwatch FB421（Not fit for Charge 3 and Charge 4）

Details

Description

Common Questions