30% off all items on the site, 30 days money back, 1 year warranty

What Are You Looking For?

Your Cart

Your Shopping Cart is Empty!

FITBIT FB421 Battery Replacement

Power up your device with the Fitbit FB421 battery — engineered for compatibility, performance, and long-lasting reliability. Batteryshop.org.uk offers a wide range of trusted battery models to keep your gear running smoothly.

Battery FB421 Compatible with Fitbit Charge 5 FB421 Activity Tracker

Click image to open expanded view

Price: £21.00 £30.00
  • Model: FB421
  • SKU: ECN12822_Oth
  • Availability: In Stock
  • Capacity: 65mAh/0.252Wh
  • Voltage: 3.87V
  • Type: Li-ion
  • Color: Black
  • Our batteries are 100% new and CE / FCC / RoHS certified for safety
  • We only use high quality materials and grade A cells to guarantee real capacity and higher recharge cycles.
  • Quick, friendly and hassle-free customer support and a full one-year warranty: if something goes wrong, we are at your disposal.
Quantity:
- +
Guarantee safe & Secure checkout
  • Free shipping apply to all
    orders over £ 9.9

  • Paypal guarantees 100%
    payment security

  • 30 days returns if you change
    your mind

SP281928SF
HOT
SP281928SF
Fitbit versa 2
£21.00 £30.00

Related Products

WX30
-30%
MOTOROLA

WX30 for Moto 360 Smart Watch

£32.59 £46.56
Availability : In Stock
  • Capacity: 300mAh
  • Voltage: 3.8V
A1848
-30%
APPLE

A1848 for Apple SmartWatch Series 3 GPS + LTE 38mm

£20.50 £29.29
Availability : In Stock
  • Capacity: 279mAh/1.07Wh
  • Voltage: 3.82V
A2058
-30%
APPLE

A2058 for Apple Watch Series 4

£20.50 £29.29
Availability : In Stock
  • Capacity: 224.9mAh/0.858Wh
  • Voltage: 3.81V
LSSP302228SE
-30%
FITBIT

LSSP302228SE for Fitbit Ionic Smartwatch

£21.49 £30.70
Availability : In Stock
  • Capacity: 1100mAh
  • Voltage: 3.8V
LSS271620SF
-30%
FITBIT

LSS271620SF for Fitbit Charge 4 FB417 Smart Watch

£21.00 £30.00
Availability : In Stock
  • Capacity: 71mAh/0.273Wh
  • Voltage: 3.85V
FB521
-30%
FITBIT

FB521 for Fitbit Sense 2 / Versa4 Smartwatch

£18.88 £26.97
Availability : In Stock
  • Capacity: 162mAh/0.627WH
  • Voltage: 3.87V
C11P1513
-30%
ASUS

C11P1513 for ASUS Smart Watch

£19.99 £28.56
Availability : In Stock
  • Capacity: 215mAh/0.79Wh
  • Voltage: 3.7V
GB-S10-432830-020H J18405
-30%
SONY

GB-S10-432830-020H J18405 for Sony Smart Watch

£27.50 £39.29
Availability : In Stock
  • Capacity: 400mAh/1.52Wh
  • Voltage: 3.8V
LI3905T44P8H302860
-30%
ZTE

LI3905T44P8H302860 for ZTE Quartz ZW10

£37.38 £53.40
Availability : In Stock
  • Capacity: 500mAh/1.9WH
  • Voltage: 3.85V
3023-34R TS920E VR42A
-30%
  • Capacity: 5.5mAh
  • Voltage: 1.5V
APP00302
-30%
MOVADO

APP00302 for Movado Connect 2.0/40

£19.99 £28.56
Availability : In Stock
  • Capacity: 300mAh/1.14Wh
  • Voltage: 3.8V

Fast Delivery

Shipping to Most Countries

safe payment

Paypal Secure Payment

Online Discount

30% Off All Batteries

Help Center

Contact Our Customer Service

Curated items

From Handpicked Manufacturers