NGM ROMEO Guide Rapide page 25

Charging the battery: Charge the battery before starting to use
the device. Connect the charger to a provided wall socket adaptor
and then plug the jack into the charging base or insert it directly
into its input on the top side of the phone. The charging base can
also be connected to a micro USB cable to charge your phone.
While the battery is charging, an animated icon on the screen
shows the charging progress. Once the battery icon is filled, it is
fully charged and the phone can be disconnected from the grid or
from the base.
Warning: To preserve the functionality of the product and the integrity of the
guarantee, we recommend the use of original NGM chargers. Please charge the
battery indoors, in a dry and favorable environment. It is normal for the battery
to get slightly warm during the charging process. The battery will reach its full
capacity when cycled several times.
ENGLISH 25
Romeo