Was given a 5v as a gift that was just returned from the vendor because of a faulty regulator and now when I opened the package charged a new set of batteries (10440) put the bad boys in and pressed the button to make sure everything was good the led lit up and blinked as it was suppose to, screwed in my standard atty and nothing no light no vape no nadda. Noticed that it was starting to feel really warm so I took off the back and went to remove the batteries well the first one came out no problems but the second was like fire in your hand so hot I couldnt hold it. Thats not normal is it and if not what could be the problem????