I design a schematic for a alarm device. I use a trigger IC use 40nA and i want to use a 2500 mAh Li-Ion battery. The device is used at outdoor (-20/60 C) at least 2 year.
I want to ask that a fully charged 18650 Li-Ion battery voltage-time graph (how many days the system work) at 40nA usage.
40nA = 0,00004 mA
and power consumption is 0,00004 mAh
with 2500 mAh device is used 7000 year. (not believe that :) )
but what is de environment and battery chemistry effect for that calculation?