Selected a tablet for my 30 year anniversary work gift despite warning from my brother to not do so as products are generally second rate. Anyway, Charged over night, 10+ hours and tablet not charging. The same charger is the type I use for my blue tooth headphones and it charged that, just not charging the actual tablet. I had actually tried the cord I use for my blue tooth head phones and briefly the charging battery showed but then went away. Advice please.