I just received my A81E from jtshop. The unit is working well and I was able to flash the new firmware (0823) successfully. This is if I'm just using the power adapter on. However if I put on the battery, the touchscreen will not work and the battery won't charge no matter how long I keep the charger on and also the power led is always green. The unit will not boot with the battery. I tried the other battery (they sent me 2) and same things happen. Then I discovered that if I place battery at an angle just so the contact points in the battery touch the contact pins in the unit, the right side of the power led turns to orange and the touchscreen starts working. But if I sit the battery properly the way it should be the above problem returns. Something is wrong with the pins. Maybe something is getting disconnected as I sit the battery the proper way. Anyway, I tried to charge the battery by sitting it at an angle and after a few hours I got it charged and I can actually use the this tablet without the charger but I have to hold the battery at an angle with a hand and I can't put on the battery cover. This proves that the batteries are good.I'm thinking of asking the seller for a replacement since I can not repair this on my own. Has anyone deal with jtshop with this kind of problem? Has anyone an idea I should try before I return this unit?Thanks in advance for any help.