MecArmy BL47 Super Mini Rechargeable LED Key Chain Bullet Flashlight Utilizes a CREE-XP-G2 LED with a lifespan up to 50,000 hours Max output up to 130 ANSI lumens with a max runtime up to 6 hours Rechargeable 10180 lithium ion battery using any USB device - charges in 1 hour Battery reverse polarity protection IPX-8 water resistance and impact resistant up to 1.5 meters