Budget Discharge Tester Options for Hobbyists (Greater than 1 Amp)

[staticx57]

@fedcas

I was also considering buying the 150W load for cell testing… I don’t think it has data output/logging, but I was planning to do that with a arduino… so I can easily plot discharge curves.

But then I thought… in what is that load better than a much more simple constant current circuit, for example the classic 4-5 components reference circuits found in the LM317 datasheet (LM317 + transistor or multiple LM317 in parallel). Or even more simple and BLF style… an array of 7135 more stability in the feedback maybe? is it important since the load and the supply voltage are almost steady?

In both case (electronic load from aliexpress or DIY circuit), once the current is kept constant, the idea is to get the discharge curve by logging the voltage vs time.

P.S.
now I have no time but tomorrow I’ll read the thread linked in the OP though

Maybe one of these would be of interest as well EBC-A20 PC Programmable Battery Tester