Scientists from South Korea have designed new photovoltaic modules with both rectangular and triangular shapes and solar cells connected in parallel, which they said have higher partial-shading ...

Ultracapacitors have a relatively low operating voltage so multiple cells must be connected in series to allow higher operating voltages. Now, a flat ultracapacitor enables smaller size ...

For those willing to put some elbow grease into it, there is an almost unlimited supply of 18650 lithium ion batteries around for cheap (or free) just waiting to be put into a battery pack of some ...