Skemer's review of the Nitecore T4K
Key Chain or EDC? Both. The T4K is a game changer in the high lumens/small body space and an exhibition of how far battery, LED and Material technology have come. We found the T4K nothing short of shocking (in a good way!) from the onset. It's 4,000 lumens, on your key-chain if you wish, with integrated OLED display giving you real time updates on lumens, runtime, modes, charging status etc.
Making our top-3 list of small-form/EDC flashlights? Absolutely
Max Output 4000 Lumens Max Beam Distance 209 m Max Beam Intensity 10,900cd Max Runtime 67hrs LED 4 x CREE XP-L2 V6 LEDs Battery Rechargeable Li-ion Beam Colour White light Length 82.3 mm Head Size 29.2 mm Weight 77g