We have a fairly new Dragon Touch tablet, but it doesn't want to charge! When it's plugged in, it gives you the charging icon, but it does not actually charge? Today, it's been plugged in for approximately 4 hours, and it is still at 0%. I did try resetting, via that reset button, but no change. Help! Should add, that we have 2 of these tablets, so I have tried another charging cable, too. No luck.