1.5V AA Duracell Procell Alkaline Battery Tests

26 Jul
2013

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The 1.5V AA Duracell Procell Alkaline batteries we’ve got for testing are what Durcell provides for professional and business use – the Duracell Professional is the business-to-business division of Duracell. The batteries we’ve got for testing are under warranty until 03-2019 and Duracell mentions shelf life of about 7 years for these batteries. What Duracell mentions about these batteries is that they can operate in temperature extremes between -20°C and +54°C, and that the Procell batteries are ideal for applications such as torches, telemeters and measuring instruments, microphones and medical devices.

According to the specifications that Duracell provides for the 1.5V AA Procell Alkaline batteries for a typical discharge performance at 21 degrees Celsius a single cell should provide about 2900mAh at 0.05A discharge current, ~2700 mAh at 0.1A, ~2300 mAh at 0.25A and about 2000 mAh at 0.5A load. These numbers however are not for constant current discharge, but instead for a duty cycle use that includes a few hours a day and we are testing with constant current discharge, so we expected to get a bit lower numbers in our tests.

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The Power Profile test checks how the battery handles different current loads before it reaches the cutoff voltage, the test starts at 0A and gradually increases with steps of 0.05A each 20 seconds until it the cutoff voltage of the cell is reached. In the case of the 1.5V AA Duracell Procell Alkaline batteries we were able to reach a current load of 1.70A before the battery has reached the cutoff value of 1V, meaning that these batteries even though Alkaline are pretty capable of handling quite high current loads.

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The Open Circuit Voltage (no load voltage) of the 1.5V AA Duracell Procell Alkaline batteries is 1.6V, though it quickly drops to 1.5V under load. We are testing all Alkaline batteries with a constant current load of 0.1A, 0.2A, 0.5A and 1A and measuring what capacity they can provide at these levels, and these Alkaline cells from Duracell are no exception. What was interesting here is that the Duracell Procell batteries are able to handle quite well higher current drain for a while and although there is an expected drop in the useable capacity you get even at 1A constant current load we got quite good performance out of them and this is something that is not very common for Alkaline batteries.

What we got out of the 1.5V AA Duracell Procell Alkaline batteries in our tests:

– 2557 mAh at 0.1A load
– 2120 mAh at 0.2A load
– 1287 mAh at 0.5A load
– 619 mAh at 1.0A load

– 3.182 Wh at 0.1A load
– 2.561 Wh at 0.2A load
– 1.482 Wh at 0.5A load
– 0.687 Wh at 1.0A load

Only the battery that we’ve tested with constant current discharge using 1A load got slightly hotter than the ambient temperature of 25 degrees Celsius that we are testing at. At the end of the discharge cycle the temperature of that battery has reached 31 degrees C. We were quite pleasantly surprised by the good capacity and the ability of these Alkaline batteries to handle higher loads with ease and this makes them interesting not only for low drain applications that typically Alkaline batteries are used for, but also for applications where higher current load may be required as they are apparently able to handle well in such situations.

To download a datasheet with the manufacturer’s battery specifications…



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8 Responses to 1.5V AA Duracell Procell Alkaline Battery Tests

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dragontirex

December 6th, 2013 at 02:19

Hi. In my testing I got about 1000mAh @ 1A and cutoff voltage was 0.8V. What cutoff voltage do you use in your battery testing 0.9V? The funny fact is that I got a dozen cheap supermarket batteries and they got pretty much the same performance as the ProCell. I’m waiting now to see how many mAh I get from them at 100mA discharge rate.

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Bloody

December 6th, 2013 at 10:24

The cutoff voltage is 1.0V and the reason is that many devices cannot continue working below 1V, especially if they use multiple batteries, they usually come with built-in protection that has a low voltage alarm at about 1.1V and there is auto shut down at about 1V.

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dragontirex

December 6th, 2013 at 15:50

I get it now. It’s a pitty because there is more than half capacity left in the battery. When you discharge it at 0.5A and 1A and the battery voltage fell under 1V. Do you let it rest for a while and then continue discharging again? Thanks 😀

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Bloody

December 6th, 2013 at 16:48

No, all of the tests are with constant discharge rate – the load is the same from the start to the end of the test (reaching the cutoff voltage). Of course there is more charge left in the battery when discharging with higher constant current after it reaches the cutoff and left to rest for a bit you can get more out of it, especially if the load is lower. In real world the conditions are rarely resembling exactly the test scenario, however this is a more easier and faster way to test and compare different batteries when you need to cover a lot of batteries and don’t have an army of people doing the tests 😉

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dragontirex

December 6th, 2013 at 23:22

Of course there is a constant current discharge rate. Constant resistance is not accurate.
I would help you test batteries but I don’t have a way to plot a graph. Do you use a CBA battery analyzer? The way I test them is one: A La Crosse BC-700 battery charger and two: a constant current load which I made. And I’m using 2 multimeters to monitor the current and the voltage. If the current goes up or down by a few miliamps, then I adjust it. Because of the value drift of the Power transistor and the resistor. And I of course time the discharge. The biggest problem with this kind of setup is the resistance of the cables, connections, multimeter shunt voltage drop and so on. I made sure that there is no big voltage drop across the sistem. I would love to get myself an much better battery analyzer ( i’m a battery junkie myself) 🙂

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Bloody

December 6th, 2013 at 23:47

Yes, I’m using a CBA – a great device that makes it much easier to properly test batteries.

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dragontirex

December 7th, 2013 at 14:41

That is very nice. Too bad I can’t get one here. Anyway, keep up the good work 🙂

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Sobin Tep

October 10th, 2014 at 20:00

I have a question that I need answered. I apologize if this is question is not related to the discussion.

– I have a device which is running on two AA Duracell batteries. The batteries (brand new) together is producing 3.4 volts (1.62 volts individually), which is estimated to run for at least 2 years. The device consumes 300 micro amp which isn’t a lot.

– Could someone tell me how long can the batteries last on 3.4 volts (1.62 volts individually) before dropping to 3.0 volts (1.5 volts) in years/months/weeks/days/hours/minutes?

Thank you!!!!!!

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