The Metabo battery & charger difference.
One battery, many solutions. Cordless Alliance System (CAS)
Metabo - LIHD: Cut the cord - keep the power.
Metabo - One Charger for Everything
ASC 55 Charger vs ASC 145 Charger
ASC 55 - Output power 55W
ASC 145 - Output power 145W - (almost 3x's faster than ASC 55 )