The Bosch Core18V Lithium-Ion 6.3 Ah Battery (GBA18V63) is the top battery in the Bosch lineup. The Core18V battery system provides greater power, more runtime, and is fully backward and forward compatible with previous 18V batteries. Employing next-generation Lithium-Ion technology, the Core18V produces up to 1,440 Watts of energy, 80% more than previous-generation 6.0 Ah batteries. Bosch has answered the need for stronger and longer-lasting battery performance in high-load applications, corded-like performance where cordless tools have previously been unable to provide enough power and runtime.