Charge your Kindle using the included power adapter. The indicator light on the power button will turn orange while charging and green when the battery is fully charged. Your device will continue charging even if you turn it off completely.
Simply so, does a light come on when charging Kindle?
When charging your Kindle, make sure the Kindle’s charging light — located by the power button — shines yellow, the normal charging color. The light turns green when charging finishes. If your Kindle’s battery isn’t charging, the device will not power on.