Need a new battery?
So you want to change your watch battery...don't. The repair can cost more than the battery if done incorrectly or with the wrong tools, including hands and fingers. You may save a couple bucks doing the battery change yourself, however, you may short circuit the watch, break the stem off, crack the crystal or band, and you'll realize that CHEAP battery replacement just cost you a lot of money. It's good to let the Pros do it.
Like most machines, watches also need periodic maintenance. A cleaning, oiling and adjustment may be recommended when the battery is good, but the watch still doesn't run quite right.