This is a Square NiCd Receiver Battery Pack for Futaba J Receivers. INCLUDES: One NiCd Receiver Battery Pack w/J Connector SPECS: Length: 2.00" Width: 1.12" Height: 1.12" Weight: 3.3oz Ampere: 600mAh Volts: 4.8V Charging: 60mA for 15 hours Quick Charging: 180mA for 5 hours COMMENTS: These used to be 500mAh, but are now rated at 600mAh (6/00 NMH) ir/jl