@lyndon I have a lot of experience with Green Cell. Polish rebrand of Chinese batteries. Sounds like a bad thing, but what isn't a Chinese rebrand now days?
They have a really good internal quality control of this imports, and that's what differentiates them from buying straight from China.
They also have a good return policies, so you're not risking anything :)
@vol Awesome, their site did look quite legitimate and limited reviews I saw were mostly positive, even the batteries manual had well formed English which is something I always watch out for.
I have had good experience with one or two Chinese brands; shout out to MPow, they gave me great customer service for £10-£20 devices