Bosch BAT181 BlueCore 18-Volt 2.4 Amp Hour NiCad  Battery
Bosch re-engineered its popular cordless tool line-up with new BLUECORE Battery Technology. Bosch is so confident that users will get up to 50-Percent longer battery life, that it is offering a two year battery guarantee with ProVantage. BLUECORE Batteries were 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. And best of all, all BLUECORE Batteries are compatible with current Bosch cordless tools.