I've got a GBA SP and a couple of older EZ Flash carts, an EZ Flash I 512Mb, and an EZ Flash II Powerstar 256 Mb. My frustration is that I go long spurts without playing and the rechargeable batteries die and lose my saves. Then they stopped charging right altogether and the saves randomly disappear. I'm pretty sick of battery-based flash carts. I'd like something that saves onto flash memory, ideally some form of SD like microSD, but it doesn't really matter. I just don't want to lose saves and I don't want to have to back up onto PC all the time. I don't want to worry when I turn off my GBA that the save will be gone when I turn it back on. I mostly see myself using it to play GBA games like Advance Wars and Castlevania, and NES games with PocketNES and instant saves. Someday I may get an NDS, so it's a bonus if it'll be useful for NDS too. Suggestions? Any clarification needed? Does what I'm looking for not exist? Should I just get an NDS + flash cart? THANKS IN ADVANCE!