These two videos show how you can set up a Portable Radio Bag using the Yaesu FT-817.

 

How to assemble the radio package for the AMP-3 Yaesu FT-817 Radio bag:

 

Dave from AMP-3 showing some features of the AMP-3 Yaesu FT-817 Radio Bag:

Links from the videos:
Portable Radio Bag– Orginally designed for the Yaesu FT-817 transceiver (will fit any equivalent sized radio).
NOCO Genius G3500 6V/12V 3.5A UltraSafe Smart Battery Charger
GT Power RC 130A Power Analyzer Battery Consumption Performance Monitor
Yaesu FT-817ND HF VHF UHF Ultra Compact HF Amateur Transceiver!