12V, Max,3.0 Ah Lithium-Ion Battery, 50% More Runtime Than Previous Generation 12V Max 2.0Ah Batteries At The Same Weight, Designed To Provide 12V Max Power & 3.0 Ah In A Lightweight 0.4 LB Battery, Works In Temperatures Down To -4 Degrees, Operates With All Bosch 12V Max Lithium-Ion Tools & Chargers.