[ No Returns Required ]: All Rovyvon Product Have 2 Year Warranty, Any Question, Contact Us Via Message, We'll Solve It Within 24 Hour. Built-in Battery: A33 LED pen light with built-in rechargeable 600 mAh battery for extra-long usage time; Moonlight (0.5 lumen-60 hours), Low (12 lumens-15 hours), Medium (50 lumens-5 hours), High (180 lumens-1 hour)