I cracked open my Suunto Core and swapped out the battery myself. Had a few Criticisms on Youtube about touching the battery terminals.. some say it affects the contact, and others say you drain the cell. I have handled a lot of batteries before, but not really those mini flat cells and have never had a problem with discharge from touching the terminals, but they probably hold a lot less. If that’s a concern for you, use plastic tweezers to put the battery in. I didn’t, maybe those will be my famous last words! Anyway.. the point of the video is to let you know how easy it is.