I always buy radio shack batteries so I know I've got good, healthy long life ones.
One scorecard shows AA Alkaline Duracell Coppertop
100mA discharge rate: 2.2mAh
500mA discharge rate 1.3 mAh
Self discard only seems to be a few % for a year, so should change much.
If my motor ends up drawing 300ma
If my batteries only produce 1.7mAh
The door takes 10 seconds to open instead of 5
It'd still run for 2.8 years. I was hoping to get 2 years or better, so a yearly replacement plan should be fail proof.
I'll order some motors and report the current tests (I normally use 12 v motor, non battery operated projects).
If I go with a 3volt motor instead of 6 volt, I could run it on 3 AA batteries instead of 4, and skip the regulator for my chip. It seems the voltage regulator take way more quiescent current than the chip! I'll have to research this some--maybe it doesn't like being run off a non-regulated source like three batteries? It'll be sleeping most of the time waking from the INT pin of a RTC DS3234. Would I be able to run the atmega328P and DS3234 directly off (3) AA batteries?