I'm a having a little issue with the Ovale V8 that I just got. I used the 900 mAh 18350 batteries that came with the kit. After vaping it for an hour or so it showed "Lo" on the little digital screen for a brief moment. And that means that the battery's already running low. So I charged the batteries that night and put it on again after it was fully charged. Vaped on it the next day for like an hour and it showed me the "Lo" again. So, I bought a new pair (1200 mAh) thinking that the batteries (that came with the kit) were bad. After the new batteries were charged I vaped on it and after an hour it showed the "Lo" thing again. Can the Ovale be faulty? Any input will be very much appreciated. Thanks in advance!