What‘s the easiest and hopefully cheapest way to get a setup where I can do theses tests myself?
Is there a charger / discharger with a USB interface that will let me access this data?
Hm the cheapest cheapest way is to discharge the battery to 3V and then charge it up again with a charger that tells you how much energy went into it. I'm afraid I don't know of an off the shelf way to get the curve, though... The way I did it isn't too hard, but it isn't the easiest either.
I think I‘ll try adding Bluetooth to my old Imax B6 charger to get that data.
Looks like Atorch DL24 battery tester can be used for that at a cost of around $22 or so. And the Tuya BW150 also has WiFi in and acts as a HID device for a couple bucks more.
