3PLUS HR Owner's Manual page 5

3. Charging
1. Position the charging cradle to the back of your device
while making sure the pins match the contact points on the
device and the charging cradle. The magnetic attraction
should then snap them together in place.
2. Insert the micro-USB cable into the charging cradle,
and then connect the USB plug into a power source. A
"Charging" icon will be shown on the screen and will
indicate the current charge level.
Tip: Make sure to completely charge your device
before first use. A full charge will take approximately
two hours (depending on the power source).
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