Listing comes with 1 new flashlight sealed in factory packaging (which includes one 18650 battery inside) plus 2 extra surefire 123a batteries for free! Flashlight can use either one 18650 or two 123a batteries to run. Here’s the manufacturer data :

SureFire Fury Intellibeam (Fury-IB-DF)

This versatile pocket-sized searchlight can be powered by either two 123A lithium batteries or a single economical 18650 lithium-ion rechargeable battery.

The proprietary IntelliBeam Technology automatically and seamlessly adjusts the virtually indestructible LED’s output to the optimal setting —anywhere from 15 to 1,500 lumens — based on your environment, so there’s never any hesitation or fumbling to manually set the output. Should you desire maximum output on demand, two simple clicks of the tailcap override the auto-adjustment function.

This 1.4"-bezel flashlight will adjust to the scene before activation, ensuring that it won't ruin your night vision by turning on max output in a dark scenario. With a precision micro-textured reflector that creates a smooth, far reaching beam with a bright central area and enough surround light for situational awareness.

Specifications:

Bezel diameter: 1.39 inches

Length: 5.6 inches

Weight w/Batteries: 6.5 ounces

Batteries: 1 x 18650 included (Can also use 2 123A Batteries)

123A Output/Runtime: 15-1100 Lumens / Up to 40 Hours

18650 Output/Runtime: 15-1500 Lumens / Up to 40 Hours

Features:

IntelliBeam Technology automatically and seamlessly adjusts light output from 15 to 1,500 lumens depending on environmental conditions

Its high-performance LED and parabolic reflector create a smooth, highly useful beam with far-reaching center and significant surround light for maintaining situational awareness

Dual fuel light powered by either two 123A lithium batteries or a single 18650 lithium-ion rechargeable battery*

Press or click tailcap switch to select auto-adjusting IntelliBeam mode, return to off and press or click on again within two seconds to select high output only

Press tailcap slightly for momentary-on, or fully press or click for constant-on

A high-strength, lightweight aerospace-aluminum body is knurled for a secure grip and Mil-Spec hard anodized for extreme resistance to abrasion, corrosion, or just about anything else you can throw at it.