Comments by "SmallSpoonBrigade" (@SmallSpoonBrigade) on "Open Source Cartridge Reader: ROMs and saves from real hardware!" video.

@Bakamoichigei PS3 is vintage, there are still plenty of original PS3s out there and I think it still enjoys patent protection. If it's not old enough to have it's patents expire, then it's not old enough to be retro.
2
If the battery is still good, you can always just wire a second battery in parallel to the main battery for a few minutes while you replace the main battery. That being said, it's far better to just use one of these units to backup the save ahead of time than to bother with that. Also, while you're at it, it's worth putting in a proper battery holder if the battery in there is soldered to the board so that the next time you don't need to. These carts just get more rare over time, so it's better to take the risk of redoing that now than later.
1
Yep, but the optical discs are even more important. Thankfully, I think it's possible to dump anything from the PS3 and older at this point, some of them are really easy like the Saturn and PS that can be done in a regular computer from RetroArch. Some are a little harder like the Dreamcast where it's just a cheap SD card adapter and disc to dump any of them. The Wii and PS3 are a little harder as they require that you have the system jailbroken to do. But, once you've done that, it's not that hard. That being said, the carts can be damaged over time, even if you don't use them, so backing those up for posterity is also a good idea. It's not a bad idea to use a combination of checksums and something like quickpar to repari minor damage and just run that on some sort of regular basis.
1