The Bosch CORE18V performance battery is the next-generation Li-Ion battery that delivers 2X the power and runtime of standard two-layer 4 Ah 18 V batteries with minimal increase in volume and weight. The GBA18V80 battery features advancements in design that reduce resistance and increase efficiency, to improve the performance-to-weight ratio of tools used on the jobsite all day. Engineered with 21700 cell technology, the battery delivers power and performance for high capacity tools. Bosch engineered the exclusive CoolPack 2.0 technology to manage the heat of the higher power cells, and it provides better cooling than the previous-generation CoolPack system. CoolPack 2.0 extends the life of the battery by 35%, lowering the cost of battery replacement.