a humble 520 nA (yes: nano-amperes) on average semi-sleeping and waiting for events that wake it up. That's years of battery life on a single coin cell...
That's seriously impressive!
I also like the Road Test concept. You apply with an idea that explains how you are going to validate a design. You get the product for free* with the condition that you submit a review.
After reading your writeup and those of other road testers, I'm now tempted to apply. But then again I'm just a hobbyist without formal electronics education, so I'm not sure if I should.
Maybe I'll lurk around in that section for a while and see how these road tests are done.
tax charge for the commercial value of the imported product
This happened to me too with an imported single board computer. Shipping + delivery + customs duty added nearly 33% to the actual price of the board!
I've realized hobby electronics is overall a rather expensive hobby here in India. Thankfully, it's quite fun too!