>> Wednesday, November 28, 2007
CD-i member alfantastic just replaced the Timekeeper battery in my 450, marked "MK 48TO8B-15". He discovered this method after wrongly thinking that the cover of the chip could be removed to reveal the crystal and battery, like indicated in this article. "The crystal and battery are actually in a separate casing attached on top of the main chip. They are totally encased inside the casing and cannot be removed from this. The battery is housed at one end of the top casing and the crystal the other. Removing the whole top would indeed gain access to the battery wires but also removes the crystal, which is needed for correct function of the machine. Battery end is to the right side of the writing if read the right way up (hope that makes sense). The top casing is secured with some kind of sealing glue at each end, so slowly and carefully i scraped this off using a scapel blade. Only work on battery end!"
"It took a while as i didn't want to damage the chip underneath. Once i thought i had scraped enough, i used a very thin and small, flatheaded screwdriver to gently prise the lid up. Again only on battery end. In effect this exposed the two battery wires that i needed to solder a new battery to. I used a 3v coin cell and battery holder (for future replacement). I then spread some thick sealing glue over top of chip for protection. As the crystal end didn't need to be prised upwards, it remained connected to the main chip and therefore the machine still functioned. Hope this has helped anyone who is intending to replace the battery themselves. Not easy but possible!"
Thanks to alfantastic