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To my understanding this watch is not for someone that changes the watch he wears everyday, right?
It has between 1 and 7 days of power reserve once fully wound.
This is not an automatic movement (e.g., Seiko 7s36) that uses the wearer's movement to wind a spring to power the watch. Automatic movements have fluid sweeping hands (e.g., "tick" six times per second), which are nice to look at, but tend to be less accurate than their quartz counterparts. Also, if you don't wear them they will stop after a fairly short period of time depending on the specific model (usually 40-60 hours). They have no battery, though, and are powered entirely by the spring that is wound by your motion.
This watch has a kinetic quartz movement which uses the wearer's movement to charge a capacitor or lithium-ion battery inside the watch. The movement is quartz so it is very accurate (several seconds per month), ticks once per second (jumps), and can hold a significant charge. Once it is fully charged this watch should be able to be off-wrist for up to 6 months while only drifting several seconds from when you set it. It is a much more friendly "grab and go" watch than an automatic.