Peter,
I send you a longer reply directly. Don't know why you can't find me, 'cause I've been mostly lurking here for years.
My short answer is that the little, inexpensive device will work, even at 150 watts, but with that, the discharge rate is *much* lower than the EVE-specified standard test discharge rate of 1/2 C. Testing each cell will end up taking nearly 7 hours with your device, so you'll need a lot of patience.
I used devices and software from WestMountinRadio.com that enabled me to test at 1/2C and give me a cool chart for each cell showing the discharge profile. It's remarkable how long LiFePO4 cells sit at right around 3.3v to 3.2v while discharging, showing steep drops at the start and end of the discharge cycle.
Best of luck with your project!
[-tv]
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