Details say's it's got a 36V 12Ah lead-acid battery - interesting.
That's a lot bigger than the 8AH battery that came in my bike but looking at the picture the case is no bigger, in fact it looks slightly smaller.
When I tried upgrading my 8AH batteries I could not find any batteries that would fit my case or even fit in the battery space on the bike – too bloody big.
So where are these small sized 12AH batteries coming from?
Not from the UK.
Is this another attempt by the Chinese manufactures to set a specification/standard - one which the rest of the world will totally ignore (as usual)

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