Battery Level of a RAM card backup cell, SRAM HP 95LX

[Dave Britten]

I'd be surprised if there were a way to read the actual voltage from the card. Consider that different cards could have different operating voltages and battery requirements, and the computer wouldn't be able to interpret those readings correctly. Seems more likely that the PCMCIA spec would just provide for a standard way to say "hey, my battery is low". No reason a card manufacturer couldn't provide a way to poll the voltage, but I can't imagine it being standard.