MecArmy PT16 Key Chain LED Flashlight 1000 Lumens, packed with one Rechargeable 16340 Battery, Lanyard Super Bright 1000 Lumens Compact LED Flashlight Uses rechargeable 16340 lithium ion technology battery Quick charge in just 90 minutes using standard micro USB charging port ***same port as many cell phones (USB Cord INCLUDED) Advanced overheat and circuit protection for added safety Constructed from aero grade aluminum alloy