Samsung Galaxy J2 Prime User Manual page 10

Basics
Charging the battery
Charge the battery before using it for the first time or when it has been unused for extended
periods.
Use only Samsung-approved chargers, batteries, and cables. Unapproved chargers or
cables can cause the battery to explode or damage the device.
1
Connect the USB cable to the USB power adaptor, and then plug the end of the USB cable
into the multipurpose jack.
Connecting the charger improperly may cause serious damage to the device. Any
damage caused by misuse is not covered by the warranty.
2
Plug the USB power adaptor into an electric socket.
3
After fully charging, disconnect the device from the charger. First unplug the charger
from the device, and then unplug it from the electric socket.
Do not remove the battery before removing the charger. This may damage the
device.
To save energy, unplug the charger when not in use. The charger does not have a
power switch, so you must unplug the charger from the electric socket when not in
use to avoid wasting power. The charger should remain close to the electric socket
and easily accessible while charging.
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