| Model No | CTB21 | | Description | Cordless Telephone Battery | | Application | Cordless Telephone | | Replacement for: | | | Chemistry | Nickel Cadmium (NiCd) | | Voltage | 4.8V | | Brand | Master (this battery is a compatible alternative to that of the original brand) | | Width | 12mm | | Height | 31mm | | Length/Breadth/Depth | 48mm | | Weight | 36g | |