This is similar to problem that was reported here and no solution yet. There is something continuously draining even a new battery is just days. Dealer diagnosed when it occurred earlier and suggested to replace battery. It is replaced with Motorcraft one which is recommended one. It is about less than a month since installed a new battery and it is drained when not driven for just 2 or 3 days. Dealer charged for battery, for diagnosis, for battery installation but problem it is there! What is happening in this case?