Post by fabricator4 on Nov 18, 2018 17:13:09 GMT 10
I'm just catching up with the progress here...
Two things strike me strongly about that battery Sublime . Both the wrap and the can inside it have particularly dark print. I've never seen real Samsung batteries with print like that. You'd think they'd want the best looking print possible but no - I think the Samsung factories apply the smallest amount of ink possible, because their bulk printing machines go so fast, if they put enough ink on the cans and wraps to appear this dark it would not dry before they had ink smeared all over the batteries and the packing machines.
The other thing that really rings alarm bells are those three little divots on the +ive connector. This is usually what is left on the terminal of a battery that has had a connection strip spot welded to it, and that strip has subsequently been removed. There will probably be spot weld marks on the bottom -ive can as well. This indicates that the cell is a recycled cell out of a battery pack, like a laptop battery pack, drill, or something else.
Also be weary if the connectors have no obvious divots, but are all scratched up. Usually this indicates that markings from the spot welding have been sanded off. The metal should be neat and clean mill finish: anything else is way too suspicious.
Post by fabricator4 on Nov 18, 2018 17:26:45 GMT 10
Just another note on the printing on cells. Unfortunately we can't tell from the fonts or even the apparent batch codes if the cells are legitimate or not. Both Samsung and LG have several plants, possibly in different countries as well. The machines used for printing on the cans and the wraps can vary from plant to plant, probably depending on what was considered best at the time for their applications. Only Samsung themselves would have records of batch numbers and which plants they came from, and would be able to tell more from looking at these, but they do not make that information available for obvious reasons.
I still stand by my statement about the dark print though. Every authentic Samsung cell I've ever seen (and LG) has washy grey printing that looks like it will rub off if you breathe on it (and sometimes it does). I think their machines are optimised for high speed throughput, not pretty lettering.
Post by fabricator4 on Nov 18, 2018 17:39:00 GMT 10
...And there's another thing. Look at the burst disks under the +ive connector Subbie... I've never seen Samsung use anything that looks like that, in fact I've never seen anything like that before. Samsung burst disks are a flat plate with a crease stamped into them to pre-stress a burstable separation point. That's just weird (but admittedly I don't go around examining burst disks LOL
Speaking of Battery safety ... this happened tonight, needed to re-wrap the batts I stripped after reading Subi's post and somehow without me seeing it, the insulator had flown out of the intended wrap - lucky I noticed it whilst inserting it into the charger as I had been feeling quite chuffed at my perfect re- wrap.... wrong - so very Farking wrong! Stay safe folks and make sure that pesky little insulator is where it should be.