DEWALT-designed electronics have been built into both tools’ switches to provide maximum life for the tools and batteries by helping to protect them from overheating, overloading, and deep discharge during use. The 20-volt’s lithium-ion batteries provide up to 35 percent more runtime than existing 18-volt lithium-ion battery technology, and the included Energy Star-qualified charger has dual voltage capabilities and it is compatible with both 12-volt max and 20-volt max DEWALT lithium-ion batteries. The tools’ slim handles fit easily into users’ hands, increasing the level of comfort during the course of long jobs, and the bright built-in LED work lights above the triggers have a 20-second delay that improves visibility in dimly lit spaces