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!

SEIKO 5J21 Battery Replacement

Power up your device with the Seiko 5J21 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 MT920 3023-24X 5J21 Compatible with Seiko Kinetic Watch Capacitor 5J21 5J22 5J32 5S21 7D46 7D48 7D56

Click image to open expanded view

Price: £26.99 £38.56
  • Model: 5J21
  • SKU: ECN12764_Oth
  • Availability: In Stock
  • Capacity:
  • Voltage:
  • Type: Coin Cell
  • Color: White
  • 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

Related Products

LSSP482230AB
-30%
SAMSUNG

LSSP482230AB for SAMSUNG Galaxy Gear 1 SM-V700

£28.99 £41.41
Availability : In Stock
  • Capacity: 315mah
  • Voltage: 3.7V
PL412221H
-30%
HUAMI

PL412221H for Huami GTS A1914 A1913

£20.88 £29.83
Availability : In Stock
  • Capacity: 220mAh/0.81WH
  • Voltage: 3.85V
T5
-30%
GARMIN

T5 for Garmin tt10 tt15 Dog Ring Battery

£19.99 £28.56
Availability : In Stock
  • Capacity: 3400mAh/12.58Wh
  • Voltage: 3.7V
BW31
-30%
XIAOMI

BW31 for Xiaomi Band 8 Pro M230381 Redmi Watch3

£18.88 £26.97
Availability : In Stock
  • Capacity: 289mAh/1.12Wh
  • Voltage: 3.87V
EB-BR500ABU
-30%
SAMSUNG

EB-BR500ABU for Samsung Galaxy Watch Active SM-R500

£22.49 £32.13
Availability : In Stock
  • Capacity: 236mAh
  • Voltage: 3.85V
LSS271621
-30%
FITBIT

LSS271621 for Fitbit Charge3 FB409 Smart Watch

£21.00 £30.00
Availability : In Stock
  • Capacity: 71mAh/0.273Wh
  • Voltage: 3.85V
PL551825
-30%
HUAMI

PL551825 for HUAMI Amazfit A2167/A2168 GTS 4

£17.88 £25.54
Availability : In Stock
  • Capacity: 300mAh/1.16Wh
  • Voltage: 3.87V
EB-BR760ABE
-30%
  • Capacity: 380mAh/1.47WH
  • Voltage: 3.85V
361-00136-10
-30%
GARMIN

361-00136-10 for Garmin Venu Sq

£18.99 £27.13
Availability : In Stock
  • Capacity: 205mAh
  • Voltage: 3.87V
C11N1510
-30%
ASUS

C11N1510 for ASUS WREN Watch

£20.88 £29.83
Availability : In Stock
  • Capacity: 300mAh/1.1WH
  • Voltage: 3.85V
APP00282
-30%
APACK

APP00282 for Apack Tambour Horizon 2nd Gen Smart Watch

£38.99 £55.70
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