On 02/08/2016 06:55 AM, Maciej W. Rozycki wrote:
As a matter of interest I've checked the MC146818 datasheet and it claims a 50µA current draw in the usual configuration with a 32768Hz oscillator.
Yup. And things have only gotten better with time. I suspect that you could power the '818 RTC with a few slices of potato and scavenged wire for several months.
--Chuck