I have been going to Mr Phung for over two years now. He is amazing. I get batteries changed and links removed in no time. It is $10 per (tax inc).
I also had my Gucci watch serviced for $120, and it now runs like new (watch was over 20 years old). For this, I had to leave it with Mr Phung for a week.
It is cash only. He is closed Sundays and Wednesdays. Best to call ahead for hours.