I had a waterproof watch that needed a new battery, so I took it to some strip-mall chain who told me that they wouldn't open it because they couldn't guarantee that it would be waterproof, yadda yadda. They gave me the name of M&S, and off I went. It's basically a kiosk located inside a Longs Drugs or Rite-Aid or something, but they do a nice job, pretty cheaply.
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