BATTERY CHARGER LI-ION/LI-POL WLCSP-20; Battery Type:Li-Ion Li-Pol; Input Voltage:6V; Battery Charge Voltage:4.44V; Charge Current Max:1.55A; Battery IC Case Style:WLCSP; No. of Pins:20Pins; No. of Series Cells:1; Operating ;RoHS Compliant: Yes