Discharge tests with NiMH LSD from 2012 (Eneloop and Ladda)

NiMHi

Newly Enlightened
Joined
Aug 20, 2018
Messages
53
Hi, I had a lot of fun making this graph after reading about NiMH (mostly from lygte-info.dk). A bought the batteries a long time ago (2012). Big warning: the measurements are probably not super correct.

Results (if image does not work: https://i.imgur.com/epeaNK0 ):
epeaNK0.png



Eneloops have been used for playing PC games with my two Xbox 360 controllers. Working great so far. Total usage... no idea. Long time nothing and then few days a lot, also sometimes with friends a couple of hours.
Ladda were bought for Nintendo Wii controllers around 2013 from IKEA. Used first year multiple times and after that not much usage (last two years nothing I think).
Almost all the Ladda's showed very low capacity, but with a couple discharge/charge cycles with BC700 almost all showed 2.0Ah.
However the second one I tested for the graph was not really full....

Measurement setup:
- Raspberry Pi 3 Model B
- ADC-DAC Pi Zero - 2 analogue inputs 12 bit resolution (Microchip MCP3202) (one for cell and one for voltage drop resistor)
- A 3.6 ohm resistor (with crappy wires was more) and code to turn on relay (and off at +/- 0.9V).
- Corrected mA in software based on multimeter measurement.
- Voltage probably 0.011 too high or something like that.

Thanks for reading.
 
Top