AccuCell Lithium-Ionen rechargeable battery suitable for BENQ-Siemens mobile phone:BENQ Siemens CF61BENQ Siemens EF61 compatible with Siemens rechargeable battery: BENQ Siemens CF61, EF61Quality mobile phone battery incl. electrical safety device for preventing overcharge and overheating.This rechargeable battery has a short-circuit protection. It`s possible to charge this battery with your existing charger.Technical specifications (no original BENQ-Siemens EF61 mobile phone rechargeable battery):System: Li-Ion rechargeable batteryVoltage: 3,7 VoltCapacity: 650mAhDimensions (LxBxH): 4,6mmWeight: 18Gramm