Hi, I'm new here but well-emersed in the 18650 recycling game
By no means an expert on the topic but after testing/fully testing over 3000 cells I would point out that some of my best cells were actually under 1 volt when opened. These particular laptop batteries were virtually new and bounced back to full health after a quick "jump"to get them within the Litokala's voltage range. I do a full discharge capacity test, checking for heat(anything uncomfortable to the touch is discarded), leave for several weeks and only accept cells above 4.1v after testing. I find that this process virtually eliminates everything with excessive IR and only ever rely on a 4-pronged tester as the Opus and Litokala's results personally don't mean much to me.
Working for me so far anyway, cheers.
By no means an expert on the topic but after testing/fully testing over 3000 cells I would point out that some of my best cells were actually under 1 volt when opened. These particular laptop batteries were virtually new and bounced back to full health after a quick "jump"to get them within the Litokala's voltage range. I do a full discharge capacity test, checking for heat(anything uncomfortable to the touch is discarded), leave for several weeks and only accept cells above 4.1v after testing. I find that this process virtually eliminates everything with excessive IR and only ever rely on a 4-pronged tester as the Opus and Litokala's results personally don't mean much to me.
Working for me so far anyway, cheers.
