They have a good reputation, but are basically available in Europe and not North America. I'm not sure if they are made in Ireland.
What does it say on the battery??
The big safety concerns I have with lithium batteries are the many fly-by-night importers of junk Chinese batteries who have no QA in place, and sell on Amazon or ebay for very low prices.
Its so bad that the US post office will not let Li-on batteries be shipped from international countries, any product with one is banned as well. That's why some in the US get cameras from China minus the battery, its illegal to mail it. It can still be sent by DHL, UPS, FEDEX, etc.