Thanks GreyFox, I k now with my 8 inch Dell venue pro 8 tablet that once I take the battery out and plug in its ac adapter it wont work. I talked to an Apple saleman 10 years ago and he said that if their ipad batteries go zero voltage then its an open circuit and the ac adapter is useless
It be good to get a froum reply from an owner of a Microsoft surface Pro 1 or 2 or any surface model experiencing an absolute dead zero volt battery and still getting it to run on the AC adapter . These tablets cant be opened up , they're disposable and not worth the high cost ( may be $200 or more with labour ) getting Microsoft to open and replace the battery. Luckily my pro 1 has few cycles at 36 and 94% of its original mAH