Features: * BlueCore batteries are engineered with internal cooling rods placed between the battery cells to absorb damaging heat * The battery cells stay cooler during operation and charging as compared with standard batteries which heat up quickly, speeding up chemical breakdown and shortening battery life * BlueCore batteries can charge in 30 minutes, while other batteries take up to 3 hours to charge when hot * Best of all, all Bluecore batteries are compatible with current Bosch cordless tools What"s In The Box: * Bosch BAT181 18-Volt 2.4 Ah BlueCore Ni-Cad Battery