I've had my watch since December 2017 and I wear it everyday. I've noticed in the last few months that the battery life isn't what it used to be... I need to charge it every week instead of every two to three weeks. Also, if anything, I've gotten lazier and I record less weekly activities than I used to, so in theory I should not be draining the battery much. Is there a battery replacement for the watch? I can't believe I need to shell out the money to buy a new watch entirely...