I hope you will coordinate with member HKJ for thorough and trustworthy third-party testing of your cells. His site is here: http://lygte-info.dk/ You will find that a good word from him on your cells will help other members here trust your brand, since we don’t know you yet and there are lots of bad brands around.
To create one battery with a large number of elements inside it very important is the fact of good repeatability \ identity characteristics for all batteries of the same model. How does the S43 model deal with this? How high is the stability / repeatability of their parameters?