Battery spring with wire diameter from 0.08mm up to 3.6mm ... steel, piano steel, SUS, alloy steel, iron, plat 1.Battery spring with wire diameter from 0.08mm up to 3.6mm2.Made ... etc3.widely used in chargerrecorder,flashlight,calculator,battery charger,toy and other electric areas4.Packing with plastic bags, inner boxes and outer ... designs are welcome,so send us your specifications now. battery spring