We've got a new iPad2. My wife promptly left the wall plug in a hotel room although she has the cable. I promptly ordered two wall plugs from ebay, (from China), advertised as "new generation iPad2 plugs" and they look like what we had before but when plugged into either one of them, the iPad does not charge. If I plug the cable into one of my Mac's USB ports, it does charge so I know it's not the cable. So, I'm in the process of getting these ebay plugs replaced or returned, but am curious if the wall plug chargers for both the ipad and ipad2 are identical? Or do they have different specs? I'm wondering if the items I got from ebay might be original iPad chargers and maybe this could explain why they don't work? Thanks!