Spare battery plus O-ring and backplate to fit Suunto watches. It is best to replace these components when you replace the battery to ensure a good contact.
There are the following battery types:
4700: For Vector HR, X-Lander, Vector, Altimax, Advizor, Yachtsman, Regatta and Mariner.
4721: For X6HR, Observer, G6 Pro, M3, X6, S6 G3 and t6.
4797: For E203.
The Core takes a standard 2032 Battery which is widely available from chemists, photography shops and hardware stores or from this website.
Others may be available by special order.
WEEE Regulations - Please Note: To remind you that old electrical equipment can be recycled, it is now marked with a crossed out wheeled bin symbol. Please do not throw any electrical equipment (including those items marked with the crossed out wheeled bin symbol) in your bin.