Struggling to find a flashlight when you need it? Don't reach for your smartphone! With the NITECORE T4K 4000 Lumen Super Bright EDC Flashlight, you've always got ready access to a super-bright light source. It's literally the world's brightest keychain flashlight, with a maximum output of 4,000 lumens equalling up to 228 yards of throw and illumination. The T4K 4000 is thumb-sized, weighing a mere 2.72 ounces. With its USB-C fast charging capability, the T4K is fully powered within 1.5 hours.