This is a 7-cell 8.4V, 1200mAh 4/5AA size,Panasonic NiMH Battery Pack from Great Planes.Designed for use as a flight powerpack in Park Flyer Electric Airplanes.FEATURES: This ElectriFly battery pack delivers exceptional performance ina compact size.2-pin Red male connector is pre-installed for plug & play simplicity.Uses genuine Panasonic Nickel-Metal Hydride 4/5AA size cells.One year quality guarantee from Great Planes.INCLUDES: One 7-cell 8.4V, 1200mAh 4/5AA sized NiMH Battery Pack w/3" wireand Red 2-Pin male Connector.REQUIRES: Charger: Use GPMM3000 for Peak Charging NiMHs(Note: If Peak Charger is not used, the battery pack must Chargeat 100-125mA for 16-20 hours before use.)SPECS: Length: 87mm (3.4")Width: 28mm (1.1") (at square end)Width: 28mm (1.1") tapering to .56" (14.3mm)(at triangle end)Height: 28mm (1.1")Weight: 5.8 oz (165g)Capacity: 1200mAhTRICKLE Charge: 25-50mAConnector: Red male 2-Pin Connector (BEC-type)