Hello,
Also, my host is a WF-503B, so I can only use 2 cr123's, 2rcr123's, or a single 18650.
Justin, what about this driver?
http://www.kaidomain.com/ProductDetails.aspx?ProductId=9910
It is a BUCK 3-12v input, 1amp output.
Let me know...so I can get this order in... :)
Thanks!