Type: Li-ion Cell Voltage: 12V Capacity: 3500mAh Weight: 168g Factory outlet, providing the best deal and professional after-sale service FCC, CE and RoHS certified, 100% compatible with the originals and may exceed the performance of OEM products No memory effect, can be charged or discharged as needed without loss of capacity Safeguard features against incorrect voltage, short circuit or internal overheating Replacement For: Dremel B812-01 B812-02 Fit for: Dremel 8200 8220 8300 Note: It's recommended that the battery should be fully charged and discharged 3 times after you receive the battery. For transport safety, our batteries are not fully charged before leave the factory. After use, please charge the battery after cooling. Package Includes: 1x Battery.