Ok. So I’m a bit of a noob with 18650s. But I did my first laptop pull and ended up with 6 Samsung icr 28a cells.
So I checked with dmm and they all read 1.0v +/- .05v. And I was sad. So I did as much reading as I could and decided to risk charging. So I put them outside in a 5 gallon stock pot and my nitecore d2 charger. So to my surprise. They read 1v for a minute then rose to 3.2v over the course of 2 more min. Double checked with dmm and confirmed 3.2v. Now they are charging at a normal pace for 18650s. No heat yet.
So… Is this normal? Am I making grenades?
My goal is to charge to 3.8 and let them rest a week to see if they self discharge. Any sign of trouble and they are getting recycled.
I’ve never read about batteries going from 1 to 3 volts like that. So any info or threads would be appreciated. I can’t seem to find any postings with a similar story.