I got a 5v.passthrough from madvapes with a 2amp ac to usb adapter. This thing rocks! My 510 was just not strong enough. This is almost too strong but it's great. I only have to tap the manuel button and then take my hit. I am going to be able to go down to 6mg nicotine now because the 12 mg nicotine is too much throat hit with this thing. IT's a monster! But after messing with not getting enough throat hit off my 510 even after removing the mesh and bridge AND direct dripping this is GREAT! I recommend this to anyone who is just not getting enough power from their 510. Now i'm also waiting for my first RIva. I kinda hope it's in the middle of the road though.Something just a little less intense . But this is so much better than vaping over and over and over just because I cant get that good hit.