I'm trying to decide btwn. the R4, M3 Simply, and the Cyclo. I currently have a DS-Xtreme (don't even ask - if I would have done the research instead of hubby there is no way I would have paid $125 for a card when I could get one for $40 as I don't need bells and whistles, but I didn't research until *after* we had the DS-Xtreme). I have a DS Lite as does dd and there is no way I'm buying another DS-X at the cost of it so I'm trying to decide on a second card. My ? is about battery life. Do any of the cards affect it greatly? Is there one card that is better than another for not sucking the battery quicker than a reg. DS game? I turned off the LED lights on the DS-X and am hoping that helps but for the new card I'm wondering what is best at not draining the battery quicker than normal.