Hi, my Casio GBD-200 support up to 5 vibrating alarms and the battery last around 3 years, a little more or less depending on how much you use the backlight function. Swapping battery is easy and cheap. It has useful functions like the stopwatch and countdown and It also has a lot of other functions I don use like steps count, Bluetooth connection for notification from your phone and an app. These things are rugged AF and the can last a lifetime, so buying second hand is a very good option since they don't get obsolete like smart watches.
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