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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.

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  • \$\begingroup\$ Seems like a good estimate. If you need to know for sure, measure it. \$\endgroup\$
    – mkeith
    Dec 27 '16 at 7:03
  • \$\begingroup\$ could be hard to measure if you don't have a data logger. \$\endgroup\$
    – Jasen
    Dec 27 '16 at 8:04
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    \$\begingroup\$ 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? \$\endgroup\$ Dec 31 '16 at 13:24
  • \$\begingroup\$ You have a mistake: "Current in mAh", unit of current is mA, not mAh \$\endgroup\$ Feb 2 '17 at 14:50
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IMHO you are doing it wrong. your calculations are only correct if the RF remote is constantly working and sending signals. And I think the 12 months is estimated by the manufacturer for an average household usage of the product.

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    \$\begingroup\$ OP's calculation of 58 uA avg. is still correct when his personal use pattern of the remote control is the consideration, because a few bursts of high current consumption and long period of no current consumption is still equivalent to a very low constant current consumption on average. So the result can be described as entirely correct. Nevertheless, I agree that it's probably a bit misleading: If the remote is used more frequently by someone else, the calculated average current consumption should also increase. \$\endgroup\$ Nov 3 '20 at 19:37

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