I would never chance using a non-Sony battery or charger in this expensive camera. This provides out of camera charging of my backup battery. DIsplays battery charge level while charging. Annoying with a large cable rather than built in prongs, but found a solution. Replace the cord with the Apple charger part with the prongs. This 1 inch cube part plugs into the Sony charger and makes for a very compact product that's much easier to carry. 4 stars because of high price and inconvenience of the cord.