RC Model Reviews

I just received my Taranis radio and was disappointed to find that the battery charger had to be purchased separately. I have lots of 12 power modules but, I'm afraid that FRSky may have used a reverse polarity plug.
Will somebody please tell me if the center pin is Positive or is it Negative?
Thanks
Ray

Ask on: http://openrcforums.com/forum/viewforum.php?f=95
for all things Taranis related.

Thanks.