NGM Facile IDEA Guide Rapide page 27

Charging the battery: charge the battery before starting to use
the device. Connect the charger to a wall socket, and then plug
the jack on the charging base (wait a moment until the red
charging led on the base will light up, before inserting the phone)
or put it directly on the micro USB port on the right side of the
phone. When notification led becomes green, charging is
complete and the phone could be removed from the charging
base.
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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