Hi everyone, I have a 08 Kia Ceed SW (1399cc petrol). The batteries in both keys need replacing as they are both dead. Managed to open one of the keys but the layout is different to any key I have seen before. Battery not exposed. There is a sealed unit inside. Is the battery within this unit?. Are they difficult to open?. Should I bring them to a Main Dealer?. Any help would be appreciated. Thanks in advance.