Become familiar with the many different types of lithium-ion batteries.
- https://coolcomponents.co.uk/blogs/news/introducing-the-makyu-formbox
- https://coolcomponents.co.uk/products/mayku-formbox-desktop-vacuum-forming
or DIY 
Making tomatoes smart - Data Science Africa 2018
60 Years of the Integrated Circuit.…ultimately this Forum, the target Technology for our respective musings and indeed the whole industry is derived from this…Happy Diamond (or should that be Germanium?!) Birthday the humble IC 
Thanks to Jack Kilby et al…
Tutorial: Heltec ESP32 Board + The Things Network
Thanks for sharing this here! I’m working on a similar series of articles for other dev boards, any other hardware that the community would like to see covered? Anything that doesn’t already have a simple TTN how to?
have a peek here to https://www.thethingsnetwork.org/labs/ always welcome to share your experience
lorawan connected ‘drifter’
On the design of a sustainable ocean drifter for developing countries PDF
