Zte AT&T GR225 User Manual page 22

Charging the battery
Your phone is powered by a rechargeable battery. For maximum battery
performance, it is recommended that you first use up the battery power and then
charge it completely. A new battery's full performance is achieved only after three
complete charge and discharge cycles.
•
Connect your travel adapter to the side of your mobile phone as shown in
the diagram.
Note: The side with arrow should be facing downwards while connecting.
•
Connect the other end of the travel adapter to the mains socket.
•
When you charge the battery, the battery charging indicator appears.
•
When the battery is fully charged, disconnect the charger.
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