This is the 2200mAh Tx battery for the Futaba 14MZ Radio.1-4553FEATURES:Plastic encased 7.4V batteryLithium-Ion chemistryUnique slide charged indicatorINCLUDES:One 7.4V 2200mAh Lithium-Ion packSPECS:Length: 2.7" (70mm)Width: 1.5" (38mm)Height: 0.79" (20mm)Weight: 3.6oz (103g)Charging/Discharging cycles: approx 300COMMENTS:The battery is not charged at the factory.Never leave the battery in the Tx when not in use.