There's nobody out there with three years on the battery -- three years ago the ADOR was still a twinkle in my eye. However you might checkout
www.Adorstore.com where there's more info on
that. Here in my lab, on one $2.88 6V battery I've run it for >4000 cycles which implies > 10years however that only took a little more than 2 days, running a special test of continuous up/down cycles. So the missing factor is that the electronics draws about 60 millionths of an amp and that adds up over long periods of time. OK...too much information, right? Bottom line is the electronics takes as much energy out of the battery in one day as the motor does for a complete cycle. Therefore, divide 10 years by two and that's 5 years. But I'm not going to claim 5 years because a carbon zinc battery sitting collecting dust on the shelf probably loses more than half its capacity. I feel good saying 3 years. But I tell people to replace the battery every year and put the used one in your flashlight -- you'll see it is still nearly new! ...and you'll have a fresh battery in your ADOR.
A few other points: 1) the ADOR beeps when it detects low battery, even when there's lots of life left; 2) the external alarm option will signal to you if the battery is low; 3) if you use accessories that are powered off the ADOR then you need to factor in the extra draw from the battery for accessories.
ROD