electric lithium battery folding bike 1, light weught and small size 2,material: magnesium alloy 3,li-battery 36V, 7/8/9/10 ... HOLD IT UP.3, THE BIKE IS MAINLY USE MAGNESIUM ALLOY, ANTI CORROSION, ANTIQUAKE, with tenacity.4,A NEW DESIGN AND ... .7,FOLDABLE AND PORTABLE, CANE BE PUT INTO TRUNK Magnesium alloy electric Foldable Bike with lithium battery