10
Bottom left button is for interface switch as showed in picture 3:
III. Charge the Battery
Please use up the battery and discharge it for 2-3 times and then
charge the battery for at least 12 hours for initial use, in order to keep
the quality of the battery.
The normal charging time of this product is 4-5 hours.
Put the battery into the inside of the terminal and connect the charger
to 100V/220V AC power supply to charge the battery. Then the
power indicator on the upper right corner of the terminal screen will
keep strolling as showed in picture 3-1:
( picture 3-1 )