Once your Kindle Paperwhite starts charging, the LED light next to your cable will light amber, to indicate that the battery is charging. On the screen, you’ll see a lightning bolt icon in the battery icon that’s in the top right corner. The light turns green when it’s full. From a dead or drained battery, a full charge might take around 3 hours using a computer. [1] X Research source
From a dead or drained battery, a full charge might take around 1-2 hours using a wall socket and adapter.