Hi does this passthrough actually operate at the 5 volts or is it less? Does this passthrough use a battery like the other ones or is it directly connected? I have heard bad things about the 510 passthrough that uses the battery. I have also read that the life of these 510 passthroughs is pretty weak something from like a couple weaks to a month before they break down. I even read that the 510 passthroughs have a weaker hit and produce less vapor then even a regular 510 battery. Is this 5volt any good or what?