Specification: 1) Type: Li -ion 2) Voltage: 14.8V; Capacity: 4.4AH 3) Replacement original battery model: BTP-550 , BT.A0101.001, HBT.0186.001, HBT.186.002. 4) For original brand laptop: Acer 　　270XV 272 272LC 　　272X 272XV 272XVI 　　273 273X 273XV 　　275 275LC SERIES TRAVELMATE 270 　　TRAVELMATE 550 SERIES 5) Dimension: 128.00 x 98.20 x 23.30 mm 6) Color: Dark Grey　　　　　 7) No memory effect 8) Both OEM and ODM are welcomed 9) Guarantee: 6-12months