There was battery standby capability on the board.". This 8K RAM board was commonly seen in many early S-100 systems. It was solid as a rock but soaked up power!
Rare Dynabyte 16K RAM Memory Board S100 S-100 Vintage IMSAI Altair
AB Digital Design Labs RAM Memory Board S100 S-100 Vintage IMSAI Altair 1981
Retro Vintage Innovation ISA ShortRam Ram / Memory Expansion Upgrade Board
Interesting Vintage Computer 16K RAM Memory Board Card
Solid State Music ( SSM ) MB-6A 8k byte static ram board w/64 ceramic 21L02's
IMSAI RAM-4A 4K byte static ram board
