Watson Battery Adapter Plate for Sony L & M Series-Type Batteries (2 Pack) For Watson Compact AC/DC or Duo Chargers; Accepts Sony NP-F550, NP-F570, NP-F770, NP-F930, NP-F950, NP-F970, NP-FM55H, NP-FM70, NP-FM90, NP-QM71, NP-QM71D, NP-QM91, or NP-QM91D Type Battery 1-Year Limited Warranty