LG G Vista 2 -H740 User Manual page 19

Charge the battery before using it for first time. Use the charger to charge the battery.
Use only LG-approved chargers, batteries and cables. If you use unapproved chargers,
batteries or cables, it may cause a battery charging delay. This can also cause the battery to
explode or damage the device, which is not covered by the warranty.
The Charger/USB Port is located at the bottom of the phone. Insert the charger and plug it into a
power outlet.
Do not open the back cover while your phone is charging.