Lithium batteries have taken over as the primary battery chemistry from applications ranging from consumer electronics to electric vehicles and all kinds of other things in between. But the standard …read more (https://hackaday.com/2026/01/23/lead-acid-battery-upgraded-to-lithium-iron-phosphate/)

Polymer Skins That Change Color and Texture When Exposed to Water
https://hackaday.com/2026/01/23/polymer-skins-that-change-color-and-texture-when-exposed-to-water/

Researchers at Stanford University recently came up with an interesting way (Phys.org summary) to create patterns and colors that emerge when a polymer is exposed to water. Although the paper …read more (https://hackaday.com/2026/01/23/polymer-skins-that-change-color-and-texture-when-exposed-to-water/)