"A new line of rechargeable batteries is energizing the power-tool industry and soon be used everything from vacuum cleaners to hybrid cars. The batteries promise to have 5 times the power, 10 times the life of current batteries. They also are said to have the ability to recharge to 90% capacity within 5 minutes. The manufacturer, A123 Systems recently unveiled its new line of hyper-efficient lithium-ion batteries. They already have a deal with Black & Decker that will see new power tools with their batteries on store shelves next year."
