This is a Ultra Power Technology UPD200 D200 15A/200W Discharger. UP-D200 is a External Discharger specially designed for UP616 charger, it must connect to the UP616 charger to discharge the Lithium battery. The maximum discharge power is 400W, and the discharge current range is 0.1-15.0A. It can meet the user fast discharging requirement, and compared with the traditional discharger, it achieve the balance discharging through the UP616 charger controlling, protect the battery from over-discharging.