Cal. No. YF20
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Before connecting with a smartphone
Charging your watch
This watch needs a special charging cord for charging.
Charge the watch enough before connecting with your smartphone.
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After charging it sufficiently, in normal use, you can use it for 2 - 4 weeks without additional charging.
For details of charging, see the following items.
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You can check the current power reserve on the watch itself and the dedicated app.