Voltage: 20V With 4pcs lithium-ion battery pack(FBLI20011) With 2pcs lithium-ion battery pack(FBLI20021) With 1pcs charger(FCLI2034) Lithium-ion battery pack(FBLI20011): Lithium-ion 2.0Ah battery LED battery power indicator One battery fits all P20S multiple tools Lithium-ion battery pack(FBLI20021): Lithium-ion 4.0Ah battery