Nitecore EA11 900 Lumens Mini Cree XM-L2 U2 LED Flashlight with a Lumen Tactical Keychain Light - Using 1 x 14500 or 1 x AA Maximum 900 Lumens output when use 1x 14500 IMR rechargeable battery Convenient dual side mode and power switch to enable easy access to five brightness, strobe SOS Subcompact size that fits in palm, pocket or purse; less than 4 inch and 2 oz. Support battery type: 1x AA or 1x 14500 lithium ion or IMR rechargeable Battery Also include a bonus lumen tactical keychain light LED: Cree XM-L2 U2 Maximum output of 900 lumens using 1x 14500 IMR rechargeable battery <ul class="a-unordered-list a-vertical"> Turbo: 900 lumens - 30 minutes High: 300 lumens - 45 minutes Medium: 160 lumens - 90 minutes Low: 70 lumens - 2 hours 30 minutes Ultra low: 1 lumens - 12 hours Use commonly available 1XAA battery <ul class="a-unordered-list a-vertical"> Turbo 160 lumens - 45 minutes High 90 lumens - 135 minutes Medium 40 lumens -165 minutes Low 17 lumen - 3hr 45 min Ultra Low 1 lumens/ 10h Dimensions: <ul class="a-unordered-list a-vertical"> Length: 3.62 inch (92mm) Head Diameter: 1 inch (25.4mm) Tail Diameter: 0.79 inch (20mm) Weight: 1.87 oz (53g) (without battery) Primary AA Battery Rechargeable AA Battery AA Size Primary L91 Lithium Battery Primary LifePO4 14500 Battery Rechargeable Li-ion 14500 Battery Rechargeable IMR 14500 Battery