Oupes Mega 2 review
The Mega 2 packs a powerful 2500W AC inverter in a small volume. Included features such as fast charge, Wi-Fi connectivity, ...
Interesting Engineering on MSN3 个月
World’s first 18650 Potassium-ion battery debuts, can replace lithium cells
An 18650 potassium-ion battery represents a category of rechargeable batteries that ... substitute for both lithium-ion ...