Swatch Skin 2006, battery dead

This is a Swatch Skin purchased in 2006 for around 10,000 yen.
The strap is made of leather and features embroidery.
I have a mild metal allergy (I get a rash when I wear metal and sweat), but I was able to use this watch.
I used it quite a bit, so I believe the color on the back has changed.
The battery has stopped, but you can get it replaced at a Swatch store. It also seems possible to replace it yourself.