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Could you tell me is there a way of accurately measuring battery life? Basically I have a listening device, it requires 2 x AA batteries, say 2400mAh each (so....4800mAh in total).

I am aware you can ‘estimate’ battery life by determining the device’s current consumption and then calculating against the battery(s) mAH rating, however this assumes the supply voltage remains constant.

I have measured the device as having anon-load voltage of 3.04V, and anoff-load voltage of 3.08V.

Also I have found the minimum total voltage required to power the listening device is1.35 V. (0.67 V per battery)

With this information how could I find out how long the device will run for by cross-checking it with a manufacturer's ‘Discharge Characteristics chart’.

I would be most appreciative if anyone could help.

Kind regards

Lee

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# Accurately Calculating Battery Life!

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