Minooka, Ill.–based BatteryJack is manufacturing a proprietary lithium-ion battery for the Kenwood TK260/360/270/370 and TK280/380/290/390/480/481 radios. The lithium-ion technology provides users with a lighter, greener, more powerful substitute for ni-cad and nickel-metal hydride batteries, the company said. In addition, the batteries’ 1900 mAH capacity increases run time by 30% over standard ni-cad batteries.