The sub assemblies and components that make up this Battery (e2, E4, E18, E21, E22, E25, E39) include this Battery Assy(yb4l-b,12v4.2ah), the most expensive part.
Some items from this specific schematic: Bolt, Upper, Cushion, Washer (6.5x20x1.2), Spacer(6.1x9x7.5).