It's getting more and more difficult to find a retailer who sells watch batteries, let alone installs them. House of Clocks does both! Installation does not cost extra, and unless the watch has a particularly complicated back to remove, they can do this service while you wait. Batteries are cheap and run about $5.50 with tax. In addition to this, they also repair clocks of all kinds. I had an older antique clock that had stopped running, and House of Clocks had my clock fixed and back to me in three days.