The other day, one of my KGO batteries Did the three long blinks. Not thinking much of it, i assumed that meant the battery was dead, so i put it on the charger. I noticed on the charger both the red and green light were on at the same time. I continued to use my other battery, but the next day, the same thing happened to my other battery. Now neither batterys work, and do the three long blinks. I've read that means there's a short somewhere, i tried pulling the pin on my cartomizer, but nothing. Neither batteries work on any cartomizer or atomizer i own, but they all work on a smaller 510 battery i own, so ive been using that as a back up. I'm Just wondering what could have caused this issue, and if there's anything i can do to resolve it. They were both still under warranty, so i contacted the Vendor as to what i should do, they suggested pulling the pins, but i informed them that thats not the issue. I've not heard back from them in two days, so im not sure what to think of all this. any help is appreciated. At the time that both the batterys stoped working. i was using a 1.5ohm dual coil cartomizer in a 3.5ml tank. The carto worked just fine for two days before this occurred.