Mark

The power button doesn't close it down and shutdown -h now doesn't either. The -P option is the default and shuts down every other pi I own. I only noticed...

I finally got time to look into this. Looking at the schematic of the power section, R107 and R108 create a divider that feeds pin 11 of the SY7215 part....

Yes it is a hardware problem, but a minor one that can be resolved with changing the value of one resistor. These parts are really small so you do need...

The Raspberry Pi Raspian OS supports a real time clock. The DS1307 is cheap, I would put in a separate 3.3V regulator for it directly off the battery. Power consumption...