u/RedSkyfang

I've got a cartridge of the game "Mouryou Senki MADARA" (魍魎戦記MADARA) I was playing for a bit the other night. It had no save data when I initially powered it on which I thought was unusual, and I just turned it on to find no save data again. So I'm assuming the battery is probably dead but how do you even open these cartridges?

Also, if anybody can provide a rundown of the ideal way to replace Famicom cartridge batteries, like if I should look into installing some type of holder or something maybe, that would be greatly appreciated, since even though I own a lot of old games I've actually never wanted to play one with a dead battery yet. xD

So I've been playing a lot of the Rock Band games lately trying to go for as many FCs as possible on guitar. I actually just played through The Beatles Rock Band for the first time this past week and got the full game FC on guitar in a few days, so I wouldn't be surprised if that's the easiest one given that I'm not playing at a very high skill level yet honestly lol. The other ones that I've made the most progress on are that I am up to 53/58 FCs on the original Rock Band and also 17/20 on Track Pack Vol. 2. From what I recall, Rock Band 2 and also the AC/DC Live Track Pack have both got some pretty hard songs... I haven't actually played any that came out after The Beatles yet so I'm not sure there. I guess mainly I'm wondering if any of the other ones are like The Beatles where there isn't really anything especially challenging and I can probably get the full game FC at my current skill level or at least without having to improve much more, or if pretty much all of the other ones have like at least one or two super hard songs that are probably above my skill level right now?