greg brinkmanwrote a review of Suunto Battery Kit for M2 on August 17, 2012
I like that I don't have to go to a jeweler to replace the battery. Granted, you get to change these a lot more often, but I guess that's what you get out of this type of watch. So far the battery has been just what it is supposed to be. I cant comment on the life of the battery yet, but hopefully it lasts as long as the original.