This is a Pre-Made Receiver Battery Pack. It uses genuine Sanyo NiCad batteries and is shrink-wrapped. There is NO CONNECTOR on the battery pack, but it does have about a 4" pair of wires to make it easy to solder your favorite connector to it. INCLUDES: One 4.8V 700mAh Flat Receiver Battery Pack w/o Connector. SPECS: Length: 56mm (2-3/16") Width: 51mm (2") Height: 14.5mm (9/16") Weight: 3.3 ozs. Nominal Voltage: 4.8V Capacity: 700mAh White Shrinkwrap REQUIRES: For the following brands of radios, This is a list of connectors to use: Futaba J series radios: FUTM3820 Futaba G series radios: FUTM4110 (NOTE: This is a servo adapter use the male G end). JR radios: HCAM2330 Kyosho/Tower System 500 radios: No longer carriedSanyoPart SAN4N700AA-4.8V