Casio G-Shock GSW-H1000 User Manual page 27

Precautions When Charging
Make sure that the charger cable connector is oriented correctly when
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connecting it to a USB port.
When using a computer for charging, connection to a USB2.0 or higher USB
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(Type-A) port only is supported. Depending on the computer model,
connection environment and other factors, charging may take a long time
or may not be possible. Charging is not performed while a computer is
hibernating.
Operation on a custom computer or a computer that has been modified from
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its original configuration is not guaranteed. Even in the case of an
unmodified commercially available computer, USB port specifications may
make charging impossible.
An error message may appear when the watch is connected to a computer
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with the charger cable.
If this happens, disconnect the charger cable from the computer and then
re-connect it.
If you cannot charge using the above procedure, try a different USB port or
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use a USB-AC adaptor.
Genuine CASIO USB-AC Adaptor
To obtain a genuine CASIO USB-AC adaptor, access the URL below and
then contact a CASIO Service Center in the country where you live.
https://s.casio.jp/w/10061en/
EN-26