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johnsmith12345
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I am trying to find the capacity of a AAA battery by discharging it. How would I be able to discharge the battery at a 1A current so that I don't have to wait for a long period of time?
... pick a low capacity battery.How would I be able to discharge the battery at a 1A current so that I don't have to wait for a long period of time?
DrZoidberg said:You realize that the discharge current affects the capacity?
If it's discharged at just a few mA, a AAA alkaline battery can deliver around 1200mAh. However at a current of 400mA the capacity is only 400mAh and at 1A it will be even much less than that. That's why alkaline batteries are really bad for digital cameras.
http://data.energizer.com/PDFs/l92.pdf
Simon Bridge said:What do you mean by "true" emf?
I think you'll find that the open circuit emf is generally not of much interest. (Though maybe you have a niche application where it is.) You should check that you are required to plot the no-load voltage, as that would be unusual. Most common would be a plot of load voltage vs. time while the load current is maintained at some specified constant level.johnsmith12345 said:Well I need it so that I can get enough data about the open circuit emf to plot a discharge curve.
The purpose of this experiment is to study the process of discharging batteries and how it affects their performance and overall lifespan.
The materials needed for this experiment include batteries (of the same type and brand), a battery tester or voltmeter, wires, a resistor, and a stopwatch or timer.
To set up the experiment, connect the battery to the resistor and voltmeter in series. Start the timer and record the voltage readings at regular intervals until the battery is fully discharged. Make sure to use the same type of battery for each trial and repeat the experiment multiple times for accurate results.
Some possible outcomes from this experiment include a decrease in voltage over time, a shorter runtime for the battery, and a decrease in overall battery capacity. These results can vary based on the type of battery and the discharge rate.
The findings from this experiment can provide valuable information for battery manufacturers to improve their products and for consumers to better understand the performance and lifespan of different types of batteries. It can also be used to optimize battery usage in various devices and applications.