I just got a new pen style in yesterday from ESCI. I looked everywhere and I can't see a model number in the book or any packaging. The problem I'm having is.. I got 2 batteries, i put the first one in and the charger light was instantly green and nothing blinked.. since this was my first e-cig I wasn't sure if the battery came precharged or not so I took it off the charger and emailed ECSI and asked them. While waiting for them to write back I went ahead and put the second battery on. It blinked a few times and the light went red. So I left it on for 12 hrs to be on the safe side. When I took it out the light stayed green with no battery in it. I put the first battery in again and still nothing changed.. no blinking and staying green. Took out the battery again and charging light still green.