Seiko 5 Automatic 21 Jewels - Silver

No, the Seiko 5 Automatic 21 Jewels is an automatic watch and is powered by the natural movement of your wrist. It does not use a battery.

You can wind the watch by wearing it regularly, as the motion of your wrist powers the automatic movement. Alternatively, you can manually wind it by gently shaking it back and forth for about 30 seconds, or by turning the crown clockwise while in its resting position (if your specific model allows manual winding).

'21 Jewels' refers to the number of synthetic jewels (like rubies) used in the movement. These jewels reduce friction at key points, increasing accuracy and durability.

The provided product description does not specify a water resistance rating. It is recommended to check the specific model's specifications or user manual for water resistance details before exposing it to water.

While the watch is built to be durable and withstand knocks, its suitability for intense sports depends on its specific water resistance and shock-proofing capabilities. It is best suited for general rugged use rather than extreme sports unless explicitly rated for them.

Automatic watches typically gain or lose a few seconds per day. For the Seiko 5 series, accuracy is generally very good for its price point, but it can be influenced by factors like temperature and magnetic fields.

Ensure the watch has been worn recently or manually wound. Automatic watches stop when not in motion for a prolonged period.

Automatic watches can gain or lose a small amount of time daily. For significant deviations, ensure it's fully wound. If issues persist, professional servicing may be required.

Avoid changing the date between 9 PM and 3 AM, as this can damage the movement. Ensure the watch is not in this sensitive time window when setting the date.