Charger type : Rapid Chemistry : Li Ion, NiCd, NiMH US, Euro ,UK, Au, AC Adapter . Replacement Single-Unit Charger For WPLN4137AR, WPLN4138AR, WPLN4139AR, WPLN4140AR etc....Uses high impact ABS and Polycarbonate plastic housings for ruggedness. Includes a 12-month free replacement warranty for manufacturer's defects Work with NNTN4497, NNTN4970, NNTN4851, NNTN4496, NNTN4072 battery pack. ...