Battery spring with wire diameter from 0.08mm up to ... carbon steel, piano steel, SUS, alloy steel, iron, plat 1.Battery spring with wire diameter from 0.08mm up to 3 ... iron, plated steel etc3.widely used in chargerrecorder,flashlight,calculator,battery charger,toy and other electric areas4.Packing with plastic bags, inner ... designs are welcome,so send us your specifications now. battery spring