【BRIGHTEST FLASHLIGHT】 With high power LED, the S3000 provides up to 1600 real lumens(Max) but only need 4 * AA batteries (battery not included). This mid-size flashlight is high on power but still compact enough to fit in your hands, backpack, survival kit, or glove compartment 【LONG-LASTING LIGHTING TIME】 Flashlight feature the PDO technology for extreme brightness, providing up to 30 hours (low light mode) of continuous running time, or 6 hours (powerful high light mode) without overheating. Lighting time is twice that of regular tactical flashlights. Lifespan is up to 50000 hours