m18 forge battery 6 0ah milwaukee m18 fb6REDLITHIUM FORGE batteries are more powerful, charge faster and have longer life than REDLITHIUM batteries. Offering 12. 0Ah HIGH OUTPUT power in a more compact size and lighter weight. Charge in 15 minutes up to 80% with the M18 dual port super fast charger Longer life for the highest number of recharges and the best performance throughout the life of the battery Greater protection against workplace conditions, the environment and inclement weather