lithuim battery with bms lithium battery. made with grade a cells. widely used for the down tube electric bike,can suitable for many different ebike type. single package size: 42x24x20 cm single gross weight:4.900 kg package type: certificate: ce/rosh/msds/un38.3include battery, charger, keys etc, 1 battery pack for 1 carton. light weight design, easy to install and remove; eco friendly and safe to use with bms system,charger, connector plug 100% test every battery, cycle life:800-1000 times. warranty:1 years, certificate:ce/rosh/msds/un38.3 there are 4-pin, 5-pin discharge sockets to choose from. application:electric bike/electric bicycle for 350w-1500w motor.syi