A300 Junior S - ONtime 220S

Ref: 8239762




My watch no longer works. it seems that the battery has died, how can i buy a new one?

You can get your battery replaced at the Workshop of your store.

What is the service life of my battery?

Under normal conditions of use, your battery will last for about 2 years.

Another question?

Is my a300 watch waterproof?

Your A300 watch is waterproof to a depth of 5ATM. This means that you can swim in a pool or the sea with your watch.

My strap is broken, how can i buy a new one?

You can buy a strap at the Workshop of one of our Decathlon stores.

I maintain my watch

- Cleaning the watch :
In order to keep your watch glass clean, it is advisable to clean it with a damp cloth.

You can also clean the charging connector with a dry toothbrush.


Here you will find the troubleshooting sheet for the A300 JUNIOR S - ONTIME 220S.
By following the steps in this sheet, you can check if there is a possible problem with your product. If necessary, you will find in the "I REPAIR" section the tutorials indicated for the repair. You can also come to the workshops of your DECATHLON store.

Link to download the watch troubleshooting sheet (coming soon).

I repair my watch

The following repairs can be carried out on this product :

Battery change

To change the battery in your altimeter watch, please follow the steps explained in the video opposite :

End of product life

If your product cannot be repaired, return it to a WEEE collection point or any DECATHLON store to optimize recycling.

Spare parts

Here is the list of spare parts for the A300 JUNIOR S - ONTIME 220S :

- 377/376 BATTERY :
Reference : 5845236

You can order spare parts (depending on availability) on our decathlon.co.uk site by clicking on one of the buttons below or contact the after-sales team at your usual DECATHLON store.

A300 Junior S - ONtime 220S
A300 Junior S - ONtime 220S

377/376 Battery

Reference : 5845236

Workshop services

You want to entrust us with your product for repair. Here is the list of services offered by our workshops :

Used resale

Coming soon

User guides

  • Need the product manual? Click download.

A300 Junior S - ONtime 220S

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