CD-i member Kyle Daniels has repaired the timekeeper battery chip and he asked us if you could use a dual battery holder, if that's the only holder your store has in stock? "Also another question I'm at a store right now that only has a two battery holder would that overpower the clock and nvram they didn't have any single battery holders". CD-i member Retrostuff, as often, has a clear answer: "The real-time clock is a hardware requirement for CD-i players. It might work for you, but you could run into problems as well. As long as the batteries are connected in parallel (i.e. more current), it will last longer and won't hurt the chip."
[Thanks, Kyle Daniels and Retrostuff]