Board Thread:Questions and Answers/@comment-4528975-20160207015723/@comment-27760525-20160522091535

Radcliffe wants to prevent the death of S.H.I.E.L.D. Agents with the LMD's, so they cover the real S.H.I.E.L.D. Agents on their mission, this may answer the question to Billy Koenig "recharging his batteries"

http://screenrant.com/agents-of-shield-season-4/