Type: Ni-MH Voltage: 24V Capacity: 4000mAh Weight: 1236g per battery with package Replacement Part: HILTI BP72 BP 72 BP60 Compatible Models: HILTI Hilti C 7/24 Hilti C 7/36, TCU 7/36 Hilti TE 5 A Announcements: 1. Please don't store the batteries for a long time, it need to be used at least once a month. 2. If it’s necessary, please using a cotton swab with alcohol to clean the battery contacts. 3. After long-time using in your power tools, please fully rest the batteries. 4. Before recharging the batteries, please make sure that the batteries have already cooled down. 5. For safe transportation, the batteries have not been full charged, after three cycles (full charge and full discharge for three times), the batteries can reach the best condition.