I have been using my new dna 250 for about a month now and I have set everything up correctly including the mod resistance and the thermal properties etc. It's a triple battery dna 250 and I removed my batteries for charging as they were just below 50 %, after fully charged I replaced them and was greeted with a shorted warning and the batteries showing empty??. I removed the batteries and then replaced them carefully and the problem was resolved??. This has made me think twice about using an external charger or could it have simply been a poor battery connection?. This is my first dna device as I have been previously rocking YiHi mods and I hope it's not a fault with the board after just a month.