Repairing your Timekeeper battery chip in a CD-i player is always a bit tricky, as it requires quite some soldering and skills. Each Timekeeper chip has 28 connection points, which you'll need to de-solder first point by point. The easy part is taking out the case and the insides, as CD-i players are all nicely screwed together. The 450 player might be the most difficult, as it is assembled the most compact and it works a bit different compared to other CD-i players. However, if you succeed in taking out the case you'll see the insides and you will locate the Timekeeper battery chip: It will be labeled as one of these: MK48T08B15, M48T08, M48T18 or DS1643.
Now, the CD-i 450 is designed tightly and there is not enough space to install a new Timekeeper + socket, as the socket adds a few mm to the total height. CD-i member found a solution for this: He cut a hole in the metal plate so the Timekeeper chips sticks a little out of it. The extra mm on top of this before the DVC is there is enough space for the socket: In this way you can also install a socket in your CD-i 450 player.
CD-i member Retrostuff has a different opinion about this: "I fitted a 28-pin IC socket to be prepared for future replacement of the chips. As these are top-loading players, chips in sockets will bump into the metal cage. It’s not a big height difference and can be countered by bending the shield a bit upwards."
[Credits: CD-i member Omegalfa from The World of CD-i and CD-i member Retrostuff from Retrostuff.org]