So I used to vape a few years back and now I want to get back into it. So I ordered a Kangertech subox mini online. I used to know what I was doing with these but let me say I haven't a clue right now and the instructions that came with it suck. So basically I had to order a battery for it so I got a 2500 mah, so for starters I hope that's alright. Now I have been charging it for awhile but it was only half charged. I tried to hit it and it is giving me nothing but air. It's not doing anything. So I just plugged it back in to finish charging. It was on and everything, but does not do anything when I hit it. Is there a certain wattage or other setting I should have this thing on? It is already too late to send it back so I'd REALLY like to figure out what I am doing wrong here. I hope it is just user error. HELP??