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1.2.2 Charging the battery
You are advised to fully charge the battery ( ). Charging status
is indicated by a percentage displayed on screen while the phone
is powered off. The percentage increases as the phone is charged.
To reduce power consumption and energy waste when the
battery is fully charged, disconnect your charger from the plug;
switch off Wi-Fi, GPS, Bluetooth or background-running
applications when not in use; reduce the backlight time, etc.
1.2.3 Reverse Charging with an OTG Cable
On-The-Go (OTG) is a USB transmitting technology that allows a
phone to connect to an external device with the help of an OTG
cable.
You can use your phone to charge other devices using an OTG
cable.
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