The ultimate renewable energy dream is a solar cell that directly powers phones and computers eliminating the need for batteries. An Israeli company has now developed solar energy technology so efficient that it may indeed make batteries obsolete. The product, developed by the firm 3G Solar Photovoltaics, is an advanced form of dye solar cell (DSC) technology, which uses glass-printed photovoltaic cells to produce electricity. While solar energy typically requires sunlight to produce electricity, these dye solar cells are so sensitive they can generate power from indirect, indoor lighting. The company has demonstrated how an ordinary computer mouse with the company’s dye solar cells can operate without a battery.