NGM Facile SEMPRE Guide Rapide page 31

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 connector on the lower side of the phone. The charging
base can also be connected to a micro USB cable to charge your
phone. An animation on screen will indicate the charging progress
and a pop-up will indicate when charging is complete and the
device may be disconnected safely from the grid.
Warning: To preserve the functionality of the product and the integrity of
the warranty, we recommend the use of original NGM chargers. Please
charge the battery indoors, in a dry and favorable environment. It's
normal for the battery to get slightly warm during the charging process.
The battery will reach its full capacity when cycled several times.
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