^^ yea i think ill buy a gba expansion pack for my m3ds real. i just want some response from people who already have it. im not planning to use the opera browser for ds since its prolly gonna be really slow and i rather just use my computer. i just want to run my gba roms. do i have to copy the rom to the expansion every time i play it or will it stay there for a while? also is there a battery in the expansion and will i have to replace it if it runs out of battery?