I spent quite a while today working on some updates to one of my more important works on this site and elsewhere, my Console Save Types list article that you can find here: https://blackfalcongames.net/?p=147
Here is a copy of the complete changelog for the new update to the article. I will probably continue to look up some thing for this article, but may not make new home-page articles for those updates if they happen soon. See this page or the original article for what’s new, I will continue to keep a thorough changelog.
4/19/2019: It’s been a while, but here are a bunch of updates and fixes. Expect more in the future. First, I found a newer (fall 2010) revision of the Genesis EEPROM games guide that I had previously missed. The guide is offline on its original site, but I found a backup on the Internet Archive and link that now. Both the older and newer revisions of the guide are there, and both are linked. The main changes are that the second version removes three games, Unnecessary Roughness ’95, Barkley: Shut Up and Jam! 2, and Blockbuster World Championship 2, which probably actually use battery-backed SRAM; and adds four games, John Madden Football ’93, John Madden Football ’93 Championship Edition, Ninja Burai Densetsu, and Honoo no Toukyuuji Dodge Danpei, along with the Meganet Modem cartridge. I know there are other dead links in the Links section, but sadly that is the way of the internet. I fixed some, but I recommend trying web.archive.org to look for any now-dead pages. Additionally, I found two old updates to this list from 2010 and 2012 that I had forgotten about and only posted on the NeoGAF version of this list, which otherwise is very out of date and won’t be updated. They have been added to the list, so the Virtual Boy is now on the list, and there is a little more PC-FX info as well. See 9/24/10 and 7/24/12 above for more. I also added bullet points to the table of contents. Additionally, I just discovered that four Game Gear baseball games use 128 byte EEPROM chips. This has been added to the list, with source links. I also added the Nintendo Switch to the list. It has a trickle charge clock and flash memory cards. Also, I worked on and improved many sections, particularly the TurboGrafx-16/ PC Engine, PC-FX, Genesis, CD-i, Wii, Wii U, PlayStation 3, PlayStation 4, Xbox 360, and Xbox One. The CD-i changes are particularly noteworthy — I added in some missing details for battery types and save sizes that I know, with new links at the bottom to match. The details I know on the batteries in non-NVRAM CD-i consoles are now on the list. Some of the more important new links go to internal board images of one of those, the DVS VE-200 CD-i, and the board inside the PC-FX BMP. Unfortunately I cannot identify either battery based just on these images, but they are very valuable nonetheless. And finally for this update, I was wrong in my previous update (2014) when I said that the Wii U was the first Nintendo system with a user-replaceable clock battery. In fact the Wii is. This has been added, along with a link showing it.