In VW mode, the VTR displays a "P" before the wattage from 3.0-10.0. From 10.5-13.0 there's no "P". There's no info on innokin's website except a pdf manual. Can anyone tell me what the P stands for? I just got it from FT last night with a Protank2, 1.8 ohm coil, and an aero adapter. I'm digging this thing. It's sweet at 9.0-9.5W/4.0V but not knowing what the display is saying is going to bug the crap outta me.