I have an old M3 micro sd flashcard (the one that has different size shells for GBA and DSLite) that I stuck with for so long because of RTC. I just replaced the battery. The patching software doesn't work in newer versions of Windows, but I haven't run into a problem with clean roms yet.
Would...
The worst is when its a dry poop, then you spend 20 minutes and ha!f a roll of TP wiping. Its like wiping TP over a magic marker, just won't stop showing.