Charge your 18 volt Metabo tools with this Li-Power Ultra-M 18V 5.2 Ah Lithium-Ion Battery (625592000). The Electronic Single Cell Protection (ESCP) increases the service life of the battery and monitors individual battery cells while in use and during the charging process. The charge level indicator identifies available energy with a push of a button. It's also designed to withstand the toughest job site conditions with a safety cell holder and "float" mounting system within the battery pack.