The i3T 2 is an upgraded version of i3T. Powered by a single AAA battery, it delivers an output up to 200 lumens, offering both constant and momentary-on options for various tasks and environments. It can be initially powered on in your preferred low or high mode depending on your needs. In addition, the i3T 2 gives you the option to use a 10440 rechargeable lithium ion battery, which can boost the maximum output to 300 lumens. Compared with i3T, the new generation boasts an extended battery life, increased by 31%, and maintains a surface temperature less than 45 degrees C even during prolonged usage. With the improved pocket clip, the flashlight features a more concealed position and effortlessly goes unnoticed due to its compact design. And the clip is now securely attached to the tail cap, preventing it from detaching from the flashlight body. Simply clip it onto a hat brim for hands-free usage. The i3T 2 offers an incredibly convenient illumination experience that you can take everywhere.