Cell components in lithium ion cells have been studied to check their effects to reduce the charge time. Factors including various separator thickness, tab width, LiPF6 concentration and solvent composition in electrolytes, cathode thickness, anode thickness and cathode active materials were studied. In addition, charge time of lithium ion cells was studied based on the charge voltage of cell. The most important variable in reducing the charge time of lithium ion cells was found to be the thickness of the cathode. The charge time of the lithium ion cells was reduced with thinner cathode. Other variables such as the separator thickness, LiPF6 concentration and solvent composition in electrolytes, anode thickness and charge voltage of lithium ion cells were also effective in reducing the charge time of the cells, but with fewer impacts. (c) 2007 Elsevier B.V. All rights reserved.