NGM Ioris Guide Rapide page 25

Charging the battery: Charge the battery before starting to use
the device. Connect the charger to a wall outlet and then plug the
supplied USB cable - Micro USB in the charging base, then put the
phone inside of it or directly enter the cable into the micro USB
connector on the bottom of the phone. When 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 charging
base.
Warning: To preserve the functionality of the product and the
integrity of the guarantee, we recommend the use of NGM original
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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