It logs your trek to a SD card and it’s oh so tiny. Other notable projects include a li-poly battery backpack for charging USB devices. (Li-Poly batteries require some specialized charging) ...

[Phil] managed to fit a 2.7 – 4.2v Li-Poly battery in the mouse’s palm rest, where there was a little extra empty space. The battery can be charged from any USB port via a custom-built ...

Transition metal valence state, a key property steering heterogeneous catalysis, has remained underexplored for its role in tuning S cathode kinetics in Li–S batteries. This study reported that CuO ...