Small triangle pack battery. Weight is only 4.7lb. Size: 10in'3.54in'4.5in 48V10A battery With XT60 connector & 54.6V 2A fast charger Each Lithium battery has passed the QC appearance and function test before shipment. The Ebike battery charge cycle exceeds 1000 times. Equipped with special battery bag. Quick and easy to install.