SimpleLight for Kindle 4th Generation Only, No Batteries Needed, See Photo for Compatible Model Slides behind Kindle and uses Kindle battery for power. NO BATTERIES EVER NEEDED. Only compatible with Kindle that is pictured. Does not fit Kindle Keyboard, Touch, Paperwhite, Voyage, or Fire. Light shuts off when Kindle goes to sleep (after 10 min of idle time), or when the arm is returned to its locked position. Minimal impact on Kindle battery life. Does not drain battery when not in use. Flexible arm allows multiple lighting angles. No glare when properly positioned.