I emailed with the company a while ago, very helpful.
The foil within this battery is different from the normal LiPo.
Also the contacts are copper.
Powerstream have made this special batch as an experiment to see whether they get adopted for use in equipment to be used with patients whilst within an MRI. So they should be non-magnetic.
I intended to order a few samples plus one of their chargers but have yet to get around to it.
Maybe easier for someone state-side to check them out ??