I am working on a design that needs to operate outside on two AA batteries for at least a year.
I have optimized the design to reduce power and using a spreadsheet analysis I now have an average current consumption. I should be able to verify that is right by monitoring a prototype for a while.
I have the following pieces of information:
- Average current consumption in mA \$Cave\$
- Supply of Duracell AA batteries in mAh \$Bsupply\$
- Starting battery voltage \$Bmax\$
- Minimum battery voltage for DC-DC converter \$Bmin\$
- Non-linear discharge profile from Duracell website https://d2ei442zrkqy2u.cloudfront.net/wp-content/uploads/2016/03/MN1500_US_CT1.pdf
- Climate data
How can I take this to create a realistic estimate?
I think it is perhaps reasonable to use the average environmental temperature \$Tave\$.
Note - I chose Duracell simply as an exemplar of a quality battery. I wouldn't need/want to consider poorer-quality batteries.
Update - average power consumption is 1.11mW.