This board is used to charge LiPo batteries at 100 or 500 mA, and has a boost converter for 5V output on a standard USB-A port.

For example, it can be used to power a TI Launchpad for outdoors radio tests with a standard USB cable.

I also added a footprint to accomodate one of my radio boards, for similar purposes.

Simple, but very useful ...at least imho!