Graphitized Multi-Walled Carbon Nanotubes 99.9%+ (OD: 10-20 nm, ID: 5-10 nm, Length: 10-30 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.