Hey yall. I just bought a kangertech cupti today and I'm having a little trouble. I have a newly charged battery in and every once in a while it will stop firing and the screen display says check battery. Sometimes if I wait a second it fires right back up and other times it take awhile for it to work again. The screen is showing a full charge and I have tried two batteries with the same issues. I am new to vaping and it's really frustrating for it to mess up whike trying to quit smoking. Any suggestions? Thanks!