I just got the Xpro m50 on Thursday and I'm not sure if there is a problem with mine or what. I have a Samsung 25r battery which was fully charged in it and after about an hour or so of vaping on a .45 (the mod reads at .35 but I've read most people's are reading .1 lower as well) at only 25-30 watts, it keeps kicking me down in wattage to the point where it won't even fire because it says there isn't enough battery power. It's supposed to do this when there's not enough power in the battery, but the on screen reading still shows the battery at ~80%. Anyone else having this problem? Is there a problem with my box? Or is there something I'm missing here? FYI I'm new to the vaping thing so I'm not very knowledgeable about most things. I'd like to find out soon whether or not I need to contact the seller, any input would be appreciated, thanks.