Just 3 1.5 volt button cells in series. I came across a similar one in an Ascentia Model J from the 80’s recently…
Bob From: M100 <[email protected]> On Behalf Of Fisher Sent: Thursday, February 9, 2023 4:06 PM To: [email protected] Subject: [M100] One Tiny Battery Pack (Cryptronics, RAM+ expansion) It’s (long since) time to replace the battery pack in my RAM+ Memory banking expansion board, and the manual <https://ftp.whtech.com/club100/doc/ramplus.pdf> doesn’t cover that aspect. I wonder if anyone here knows this kit? It’s been charging in a laptop all day, and it hasn’t exploded, but it’s only at 0.8V and probably won’t go any higher, The battery is just three button cells (I guess NiMH?) welded to a couple of copper strips and shrink-wrapped. I suppose if I knew what cells to get then I could solder them to the copper (if that would work in light of my not owning a spot welder thingamabob.) Better, maybe someone sells a comparable battery pack. I just don’t know where to start looking. Still, it’s a fun piece of ModelT gadgetry. Expansion board: https://i.imgur.com/TC6ng2Y.jpg Better look at battery: https://i.imgur.com/YKutRcH.png and the Option ROM: https://i.imgur.com/80ZbF4E.jpg Thanks for reading Sean January 01, 1900
