[/quote]If it's 30 microamps that's 0.03 milliamps. My unit uses 4 AA batteries, each of which should be around 24,000 mAH. So they should last 80,000 hours, which is about 9 years.

That figure of 0.03 was just a guess and could be off by a factor of several. The batteries themselves will have a shelf life even with no drain. There are probably non-linear effects involved too. [/quote]

Actually, I inquired specifically about the quiescent current battery drain in the Steripen Journey that runs on two CR123 cells rather than the older version that runs off the AA cells.