The M18™ Redlithium™ Forge™ XC8.0 Battery Pack Delivers High Output™ 12.0 Power In A Smaller Size, High-Speed Cooling For Less Downtime In High-Demand Applications, 35-Minute Supercharge to 80%, and The Longest Life VS Redlithium™ Batteries. Redlithium™ Forge™ Are Milwaukee'S Most Powerful, Fastest Charging, and Longest-Life Batteries. The M18™ Redlithium™ Forge™ XC8.0 Delivers 8 Amp Hours Of Runtime With The Same Power As The M18™ Redlithium™ High Output™ HD12.0, In A Smaller Size and Lighter Weight Desig