WATCH BATTERY

Casio Watch Battery

Casio digital and quartz watches commonly take the 377 (SR626SW); G-Shock and occasional analog models may use CR2016 or 364.

Most common for Casio watches

1.55V · 6.8 mm × 2.6 mm · 24 mAh

1.55V · 9.5 mm × 2.1 mm · 38 mAh

1.55V · 6.8 mm × 2.6 mm · 27 mAh

3V · 20 mm × 1.6 mm · 90 mAh

A simple 5-minute job for most watches. You will need a small screwdriver or case knife, tweezers and a new cell.

Open the case back: remove screws or pry the friction-fit back with a case knife.
Remove the old cell, note the model, and check the polarity before inserting.
Insert the new cell with the correct side facing up — do not touch the surfaces with bare fingers.
Refit the case back and press the crown/gasket to restore water resistance.

What is a 377 battery?

The 377 (SR626SW) is a 6.8 mm × 2.6 mm 1.55V silver-oxide button cell (~24 mAh) used in many quartz watch movements.

What is an SR626 battery?

SR626 is a 6.8 mm × 2.6 mm 1.55V silver-oxide button cell (~27 mAh) widely used in small quartz watches.

What is a 364 battery?

The 364 (SR621SW) is a 6.8 mm × 2.1 mm 1.55V silver-oxide button cell (~18 mAh) for ultra-thin movements.

Send us your logo and target market — we will reply with packaging options, MOQ and pricing within 24 hours.