18V Li-Ion 4Ah Battery

Bosch 18V Lithium-Ion Battery. It features Bosch Exclusive Cool-Pack 2.0 Technology that provides up to 135% more battery life than batteries without. It weighs 1.8 lb and provides performance comparable to batteries that are up to 35% larger. It features backward & forward compatibility with all Bosch 18V tools & chargers. It charges to 80% in only 41 minutes & 100% in only 55 minutes using the optional Bosch BC1880 18V Fast Charger. It works in cold weather conditions down to -4 degrees.