The unfortunate thing here is I know when people have issues they post their battery wattage. I have 3 different types of batteries and I don't know the wattage for any of them. :/ They are all ego batteries. One is really long, one is slightly shorter, and one is the small ego with the blue light function. I first had the issue with Tasty Vapor's ego DC carts. They used to last me from 1-2 weeks. I was using Atomic Cinnacide. Then all of a sudden every cart would only last 2-3 days and it would go burnt. The cotton (or whatever it is) would turn black around the coil and taste bland. I tried asking them about it, and lets just say it didn't go very well. I ended up getting no help from them and the misunderstood my question for a complaint. So I found the same carts elsewhere. Same issue. So then I switched to a different cart, the smoktech ego mega DC. The first one seemed to work okay. Then by accident I bought the shorty version. They also burnt out within 2-3 days. I ordered myself the mega version again, and I guess the first one was a fluke, because again I've used this one for about 2 days and it's burnt out. I can't afford to keep using a new cart every 2-3 days. I don't understand why before these carts were lasting so long and now they aren't. I have been making sure as soon as the juice gets a bit dry tasting I refill. I know smoking an emptier cart can cause the burning. Maybe I'm smoking more than I used to? I have been really stressed lately so I don't know. Does anyone have suggestions or tips on how to make sure they don't burn?