Advantages
The high-endurance 18 Volt XL battery with 4.0 Ah and COOLPACK technology
 
Up to 65% more run time compared to existing 3.0 Ah battery using high quality Li-Ion cells
Bosch COOLPACK manages the temperature of the battery cells actively and reduces heat-up which is the main killer for every battery cell
18 V 4,0 Ah batteries have the same weight as existing Bosch 3.0 Ah batteries and are the lightest in the market