I know you said that using a larger battery should lengthen the lifespan of it. My question is, how long would a 2025 be expected to last, and how long would the larger size extend that by? (without taking any risks) I also heard that Yellow version has a different size battery than the other Gen I & II games. Will a 2032 (was that it?) work in it?

Does the size of battery that will work and the lifespan expected of it vary from game to game? I also have Dragon Warrior I & II and Dragon Warrior III (GBC) and may need to replace their batteries.

I also heard that Ruby, Sapphire, and Emerald used an internal battery to keep track of time, and that it can run out. Can it be safely changed without losing save data? What does that involve?

Thanks!