With the new ipad battery draining faster and taking longer to charger, I'd like to be able to charge it will I'm using it at home. However, I need extra long cord so i can comfortably use the ipad in bed or on the couch. My third party 10ft cord came in the mail but it doesn't work. I dont see a 10ft cord on the apple accessory site. Do I just have to buy the apple one or maybe I could just buy extension cord??