Devices NAVIO, xx66, xx40 can be charged via the USB port, but due to the low current intensity (about 0.3 to 0.5A) it can take up to several times longer than charging with correct charger.
In the case when the current consumption level is too high, your device may not charge at all, so if you must charge the device via the USB port, it is recommended to disable navigation device while charging.