I have a EMP hardened Solark. From what I have seen the hardening is circular magnets around Wires inside. 2 magnets around the Battery cables and magnets around each solar panel.
I just bought 96 cells from them for my electric car conversion. They look perfect. Problem is that the seller lied. I asked them if the cells have a barcode and they said that this type of cells do not have barcode. The barcode is scratched.
I will test them when I get to install them an post...
I also bought twice before from Jenny Wu - Docan with no issues. perfect experience.
https://www.alibaba.com/product-detail/Jenny-Wu-Docan-EV-LF280K-6000_1600407171889.html?spm=a2700.wholesale.0.0.590d4965ODtlUg
It's probably the seller. I told them that I will post on solar forums. If the batteries are good I will come back here and let everybody know. the specs for the batteries are very good. 96s is only 168Kg which is perfect for my car.