I know this has been discussed before, but I don't think there is an actual thread that covers the subject. I am seriously considering getting a heated vest (I must be getting older!). I think I am looking for one that has both inserted batteries and can be plugged into the 12 volt panel power source. I'm looking for input/knowledge/experience with whatever you use. Brand names, features and purchasing sources would be great. What do you like, what do you not like, pros and cons.