From reading a lot on atty preferences, the GENERAL consensus seems to be:
3.7v - Cisco LR
5.0v - Joye SR
6.0v - Ikenvape HV
why do you list the voltage? I do not understand that part. what is the difference between the 3.7, 5.0 and 6.0? are those specific models of REO's? I am going to be getting a mini woodvil. what volt model is that?