electric lithium battery folding bike 1, light weught and small size 2,material: magnesium alloy 3,li-battery 36V, 7/8/9/10 A MATERIAL:magnesium alloyFOLDING SIZE640X280X810mmEXTENDED SIZE1255X490X1090mmWEIGHT≤23kg (including battery)MAX LOAD 75kgWheel SIZE300mmbrakedrum brakeFULL CHARGE INDURANCE ≤70kmBATTERY lithium battery : 36V, 7Ah/8Ah/9Ah/10AhPOWER 180WMAX SPEED 20km/hPACKAGE SIZE: 740*290* ...