2 of them I got late last summer, the other 3 I got a year before that. But I only used them for comps so really very little use and they are already trained. To float over 17 volts.
just curious but is it possible to use the 12v and 16v post at the same time? Say you have your vehicles electrical system hooked up to the 12v post and your amp hooked up to the 16v post. Would that not work or what?