ProductNO.: LBAC4000B Type: li-ionCapacity: 4400 mAhVoltage: 14.8 VColor: BlackCellSpec.: 18650Size: 211.40x70.60x22.30 (mm)NetWeight: 423 gCellQuantity: 8Series/Parallel:4S2PBatteryCode : BT.T5003.001,002 BT.T5005.001,002 BT.T5007.001,002 LC.BTP03.003FitLaptopModels: ACERTravelMAte4000,4500,2300Series AcerAspire1680Series notfitAcerTravelMate4050-4051