do you realise that you are tarring all the Chinese e-bike importers here with the same brush? Have you got any proof that any battery that I, Kudos, Amp, Cyclotricity, Edge.Bike or Juicy sell (those present on here) gives less than what is labelled?
Although you don't say that we do, but the inference is 'don't buy Chinese batteries', they are sus.
I'm not tarring anyone with any brush.
But I refuse to pretend the range on some Chinese batteries is not disappointing given the number printed on the side.
Gubbins on here posted something similar a few days ago.
Motors, for the sake of convenience, go the other way - stick 250W on it when in reality it's more.
My advice to the OP would be to make sure, insofar as is possible, the cells are a good spec.
The only certain way would be to buy the cells piecemeal and make up a pack/get someone to do it.
On the flip-side could we say that Bosch, Shimano and Yamaha don't give full access to all the amp hours in your battery? given they shut down sooner than perhaps other batteries do to extend their life?
So could the reverse be true in some cases? Chinese batteries have more capacity for their stated capacity when compared with the 3 above ?
I think we could say that, although the 13.4ah pattern battery I had didn't last any longer than the 11ah Bosch one.
It also suffered from sag out of the box, reducing the effective capacity still further.
It also started to lose ability to hold charge quite quickly.
Which is another point about some generic Chinese batteries - they do not seem to last long.
One of my factory Bosch batteries is coming up to six years old and still holds as much charge as it ever did.
If the capacity had reduced I would say so, because unlike some posters on this thread, I couldn't give a stuff about any battery or bike brand, including those I own.
Bosch and Riese and Muller have done well for me, so my posts reflect that.
But if the bike blows up tomorrow I will post about it.