Gaming DS Battery question?

[Aijelsop]

I'm not sure how long I've had my DS Lite, so to be safe, I keep the light on 3 instead of 4. If the battery does run out (which is probably won't) and I order a new DS Lite battery and replace it... do I loose WiFi stuff? Such as AC:WW do I loose my FC with the new battery, or is it the system?

 

[PeregrinFig]

Your FC is saved to the cartridge, not the system at all. I believe it just checks your system ID and Wifi settings, which are most likely not saved on the battery, so I doubt you'd lose anything by replacing the battery.