Finished power board routing (first attempt)
Routed all signals on power test board. There are no airwires, and the
board passes DRC. I believe I have kept the inductive loops near the
charger pretty small, but they could probably be improved. I also made
the traces connected to the sense resistor width 12, whereas the rest of
the traces are width 8. I am not aware of any other special layout
considerations for this design, but they may exist.