Four AA batteries. The Led Lenser P14 doesn't need more to turn night into day. With light output of up to 800 lm in 'Boost Mode', its beam can penetrate up to 350 m into the night. Additionally the P14, like all lights in the P- Series, has a standardized function range - ideal for those who value good design combined with uncomplicated functionality. Specifications: - Lumens: 800 - Distance: 350m - Battery Life: 50h - Warranty: 12 months