Single hose portable ACs suffer from terrible efficiency inherent to their design. Here is how they work and how to improve their efficiency.
Reuse, reduce, recycle! Get yourself the ingredients for your own cheap batteries by harvesting lithium-ion cells from old batteries!
Design and build your own inexpensive DIY lithium ion battery pack!
A 3D printer enclosure made of tempered steel with a safety glass front door for 100€, with optional fan assembly. BoM & build guide.