I'm also new to this thing and my main concern is to play GBA games, nowadays most cards don't have Real Time Clock functionality anymore except M3 perfect (from all the reviews I've read so far).
However my question is: Are there many GBA games that require RTC functionality (except for the Pokemon games)? If not I will buy a cheaper one.
Another thing: If there are a lot of GBA games which require RTC how long does the battery of the M3 Mini SD last?
Thanks for helping out.