I dont know about the burning parts unless it's on a vv mod.. with 3.7 seems alright. Ive test run 3 ego-t atties, and one of them them was harsh burning... meaning the juice wasnt hitting the atty at all, had to prime puff it without the battery a couple of times, maybe your friend had the same probs? that ego t thats on the sb was tested at 2.2 ohms.