for Sony NP-FW50 and accumulators are various derivatives, with which one the fumbling the store on the camera saves and it can continue to use. According to back the device loads with 450 mA + - 50mA what amounts to a fairly gentle charging and also can take time. The original battery has 4.5 hours of my A6000 hand ........ Various accumulators are fit well in the charging cradle, the haptics and workmanship is really good. What more could you want for that price? Possibly even a second purchase which can then remain in the car ......;)