Got the AllWinner A13 7" tablet, it was working in the beginning and the battery suddenly unable to charge. Contacted McBub customer service and exchanged emails for over a month. All the customer service staff saying they make little profit on these tablets and unable to help me on the battery issue. At one point the customer service ask me to fix the battery issue with local vendor while my tablet is still under the 12 months warranty. What a disappointment with this company....and the tablet battery die so fast(less than 5 months).