This 18V Starter Kit is the ideal solution to reducing downtime and increasing productivity for users tackling the most demanding and brutal applications. The kit includes an 18V 6.3Ah Lithium-Ion Battery and Charger. The Bosch CORE18V® 6 Ah high power battery delivers 50% more runtime and over 75% more power than the CORE18V® 4 Ah battery, powering high-demand applications. It features two layers of enhanced 21700 cells for greater battery efficiency. The battery has Bosch-exclusive CoolPack™ 2.0 Technology, which cools the battery faster and helps provide longer lifetime compared to Bosch 18V batteries without CoolPack™ 2.0. The fast charger provides reliable performance.