Can be directly connected to the charging head charging. Need to pay attention to the selection of charging head voltage and current, choose the charging head of 5V1A, do not use fast charging, most of the current mobile phones are fast chargers, the current is not suitable for charging the watch is easy to damage the battery, the charger of the old mobile phone can basically be used. The official recommendation is still to use the usb port on your computer for charging.
Yes, but watch the voltage. However, the official recommendation is to only use the USB port to charge