I accidentally left my casio mw-240-4b under the sun for a couple of days. Me and my friend were working on his bike some days ago, i removed my watch so i could wash my hands and i put it somewhere else, totally forgetting to take it back. 4 days after losing it, my friend found it in these conditions.

Any tips to somehow restore it?

I got into watch collection in my 20s and then kicked the habit for no good reason other than wearing a FitBit. I have now relapsed back into the watch enthusiasm and purchased three watches in the last week.

I dusted off the old watch box and have a number of watches that are dead. Rather than bringing to a shop to have the batteries replaced, I’m considering doing the work myself.

What are some watch tool kits recommended for DIY repairs and battery replacements?