Recently bought the GLV2 5V (LOVE it) I am a carto user and find that this thing really sucks up my juice. A blank V4L coolcart filled with my favorite juice of the day only lasts me about 2hrs of mod-heavy vaping before it needs refilling. I'm used to the coolcarts lasting at least 6hrs on my V4L XL(380 mah)batts. If anyone has experience with a juice delivery system that will last longer than 2hrs and not have to be fiddled with during the time it's used, I'd love to hear about it TIA!