This is a common problem! Well done Nokia! Very clever. It looks like after a year you have to get a new phone or it will prevent you from using it. I am charging my BL-5C batteries in a friend's broken 6600 to use in my 6230. It won't accept charge cords, like a spoilt child on hunger strike - "I want to die!" Charge block hardware replacement doesn't work. The Nokia shop recommends CarphoneWarehouse repair: