Martin, do you know which 21700 batteries will Imalent be using in this? If it’s not too late, I recommend the Molicel P42A, which Mooch says hits harder and runs longer than the 40T in his test. It is also cheaper than the Samsung 40T so should be a cost savings to Imalent for a superior product
If Imalent plans to use highest capacity 21700 such as the Samsung 50E or LG M50, I suggest they look at the much cheaper Lishen LR2170SF that Mooch says beats the 40T and 50E and is also the same in my experience from my own testing.