Battery specifications: Type: Li-ion Cell Voltage: 12V Capacity: 3500mAh Weight: 191g per battery with package Replacement For: Dremel B812-01 B812-02 Fit for: ( Please search with "Ctrl+F" ) Dremel 8200 8220 8300 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.
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