Proton users will love the advanced functions on the Proton Mini Express Mod which include temperature control, custom Wattage Curve, Bypass Mode, custom TCR, 3 Coil Memory Slots to save your favorite settings and more. The Proton Mini Express Mod houses an internal 3400mAh battery that has a longer lifespan than many other mods and it can be charged with a fast 2A quick charge. The Proton Mini also packs up to an impressive 120W of power.