Type: Sony Li-ion Cell Voltage: 21.6V Capacity: 4000mAh Weight: 716g per Replaces battery model number: B22 , B22/1.6, B22/2.6 , B22/3.3 Compatible with the following models: ( Please search with "Ctrl+F" ) Hilti AG 125-A22 Hilti HDE 500-A22 Hilti SCM 22-A, SCW 22-A, SD 5000-A22 Hilti SF 22-A, SFC 22-A, SFH 22-A Hilti SID 22-A Hilti SIW 22-A, SIW 22T-A Hilti TE 2-A22, TE 4-A22 Hilti WSR 22-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.