So first, Ive never pulled cells out of anything before.
If I were to clean the ends of these up, and re-wrap them, (all but two have damaged or no wrap) could I charge these up and use them in my flashlights? (All at 3.43v)
A Makita Batterypack was left at my house by contractors over a year ago and I finally decided to pull it open, to find five 18650s bearing the code SE US18650VT.
With a quick google search, It looks like its made by Sony.
So far, having only really looked at the link above. It seems like a decent cell?
Pretty low capacity, but may be relatively high drain?
I mean, it was in a battery pack for a drill, so I would think it should be pretty capeable?
Be extremely careful with any unwrapped li-ion cells. The ones with complete wrapping should be good to go for charging and use in an 18650 format flashlight. Clean up spot welds carefully, maybe with a dremel type rotary tool if you'd like.
Thanks.
I do understand the dangers of unwrapped cells. But thats about all I understand here.
Some further reading here about this cell shows its pretty dated.
This Quote is from 2015
I cant do any kind of testing other than checking their voltage.
Is there anything that may make these dangerous to use?
I dont know much about Internal Resistance, but have a vague idea it might be something relevant here?
If they were mine I’d use them since you have them and the price is right. Just know they are low capacity cells so carry a spare with ya if you plan on using the light long term.
They appear to be fine as far a usability — but even new these cells are much to talk about — I had those same cells in a 12v Ryobi drill pack — replaced with VTC6 cells — drill now has 3 times the torque and capacity