The Bosch line of cordless tools uses the industry's most advanced lithium-ion technology for greater battery life and more run time, all in a lighter package. Bosch High Capacity (HC) Lithium-Ion Batteries work longer up to 50% longer run time. They also work in colder environments, optimized cold weather performance, down to -4°F/-20°C. An integrated battery fuel gauge is provided to make your job easier.