Hi all, this might seem like a silly question but can anyone give advise on how to change a ToyWatch battery? Got the back off my XL Fluo but battery seems to be under some casing... It looks like the only way to get the casing off is to remove the winder... Am I missing something here?

Would take it in to get changed but costs just under £10... This seems silly when I have the tools and battery do it myself

Thanks for your help :)