Hello fellow vapers. Just want some feedback from those of you that are more in the know than myself. I am currently using genuine Sony VTC4 batteries in my mech mods. My builds are between 0.3-0.5 ohms. The battery life is terrible with my VTC4s. I can get several hits before I get diminished flavor, if I chain vape the battery is dead within an hour. This is consistent with all 4 of my batteries on a full charge. Are there any 30amp batteries on the market with a little longer life? I am familiar with ohms law and battery safety. Thanks guys!