This 6.0Ah battery delivers the same power performance as the 12.0Ah HIGHOUTPUT Battery whilst being both 30% smaller and 40% lighter.Unlike previous generations of Milwaukee batteries that work on cylindrical battery cells, the FORGE batteries employ rectangular design of cells which not only takes up less space, but is noticeably more efficient.As you would expect with any REDLITHIUM battery, the M18 FB6 offers the best protection from weather and environmental conditions, especially on the jobsite. The housing has been designed with provide protection from common solvents, oils and greases.When partnered with the Milwaukee M18 DBSC Dual Super Charger, the battery will charge up to 100% capacity in 25mins!