Sorry for late review but had to test product first and being a charger needed to use more than once.
Was almost ready to give poor review when this worked once then refused to work for second set of batteries, a little investigation and discovered the "trays" the batteries go into were not seated all the way in the charger. No clue if arrived that way or removal of first set caused this, or a combo of both. Locked them back in place and after 5 more uses have had flawless performance from this charger. recommend this if like me are using a dual battery grip or for two or more singles on your camera