RamFactor
RamFactor comes with 256K, 512k or 1 MEG on the main board, and is further expandable via a 4 MEG Expander card.
With the RamCharger battery back-up option, the low power RamFactor will retain programs and data for over 10 hours during power failures. Compatible with II+, IIe, and IIgs.
Diagnostic software was part of the A2/A3 Appleworks Expander disks.
RamFactor - revision
RamFactor 4 Meg Expander
RamCharger
RamCharger - inside
Manuals & files
Opens on ae.applearchives.com (not rehosted here).
Source page: https://ae.applearchives.com/all_apple_iis/ramfactor/