Am I calculating battery life expectancy correctly for this RF receiver?

I have this RF remote/receiver. Though the manual says battery life for the receiver is at least 12 months, I easily get 2 years of operation on a fresh set of batteries. The receiver 4 uses AAA batteries, so that should be 6V at 1200 mAh. Assuming there are external factors like self-discharging, the battery life is further decreased by 15%. I'm basing my calculations from this calculator.

Battery Life in years = Battery Capacity in mAh / Current in mAh / 24 / 365 * (1 -.85)

So based upon a 2 year life span (and assuming the .15 constant is correct) is it fair assume that the receiver is drawing on average around 58uA?

I realize I'm making some assumptions here, like the .15 constant. And I'm fairly sure the receiver is operating in sleep mode and waking up, but I want to make sure I understand this before addressing those assumptions.

• Seems like a good estimate. If you need to know for sure, measure it. Commented Dec 27, 2016 at 7:03
• could be hard to measure if you don't have a data logger. Commented Dec 27, 2016 at 8:04
• In the manual it says the receiver operates on AA batteries.Note that batteries have a voltage-mAh discharge curve,which means that as you consume the battery energy,their total voltage drops.The linked document says that the receiver must be supplied with at least 5.3V.Have you considered this? Commented Dec 31, 2016 at 13:24
• You have a mistake: "Current in mAh", unit of current is mA, not mAh Commented Feb 2, 2017 at 14:50
• Self discharge is no external factor, it is internal of the battery.
– Uwe
Commented Dec 4, 2022 at 8:18