Graphitized Multi-Walled Carbon Nanotubes, 99.9%+ (OD: 8-15 nm, ID: 3-5 nm, Length: ~ 50 um) are used in 1) Electromagnetic-wave absorption and shielding 2) Energy conversion 3) Lithium-battery anodes 4) Hydrogen storage 5) Nanotube composites (by filling or coating.