The Bosch GBA 18 V 2.0 Ah M-B Professional is a lightweight 18 Volt compact battery with 2.0 Ah & Cool Pack technology. The Cool Pack technology means that the batteries life time could be up to 100% longer than a battery without Cool Pack. It is lightweight for even more comfortable work, especially in overhead applications. The Bosch flexible power system means that the battery is suitable for all tools in one Voltage class. This battery is extremely tough, even surviving a 3m drop onto concrete.