I did some measurings with the Zero.

When attaching power without card inserted the board first draws 27mA and 

then after a couple of seconds it goes up to 56mA (waiting for usb boot?)

When holding board in reset by shorting the RUN pins it draws only 2.7-3mA(!)

When fully booted into raspbian lite with hdmi on it draws 99mA

after running 'tvservice -o' it draws 79mA 

after sudo poweroff it draws 22mA