I have bough this battery to replace the one which was for last two years in my Casio watch. unfortunately - once it arrived and been fitted inside - lasted barely for over a week or two. This is low quality product with very short life left so definitely not recommended.
On the bright side I can say that item arrived promptly and in retail packaging - but that will not help me running my watch, would it?
To sum up - avoid - and also be careful with the seller - who knows what sort of low quality he might be selling in the future.