Hi I'm new to this forum and to the flash card thing. I did a lot of reading and I still have some questions on which flash card is suited to my needs. 1 - I want to use it to unlock bonuses in my DS games, like MegaMan Battle Network 5 Twin Leaders, Lunar Knights (Japanese version), etc. So I need one that supports some kind of automatic GBA game load feature on it; 2 - 90% to 100% GBA roms support (I intend to use it for GBA games solely for DS games I will use the R4); 3 - Is the RTC functionality a real must have? If so M3 seems to be the only one I can find that supports it with an internal battery; 3 - Thus raising the question how long does such an RTC support battery last and is it replacable (for that particular flash card)? 4 - For the moment I'm stuck between EZ-flash 4 and M3 at this moment unless someone knows of a brand that better fits the needs I wrote above. Thank you for your help. I really appreciate it. God bless you.