Question about drained 18650s (like sub 2.4V)
So I left some 18650's (three of them) in a 260w box mod for couple months and they are dead. Charging them doesn't do anything. I've done some googling and learned a bit about "waking" up dormant cells, since they have protection inside the batteries. There are some videos on how to wake them, but involve non-household items to do so.
I have no problem ditching them since I read that once they do go to sleep, it is dangerous to keep using them. BTW, they are Samsung 25r batteries
Posted Dec 3, 2015, 8:47 AM UTC
If they've been under 2.0V or so for a while then they've been damaged and would probably be lousy performing batteries even if you did recover them.
Unfortunately, it's time to recycle them.
I figured as much- probably better anyhow. thanks