It is a part of Acer laptop battery but different from the old and other parts. This compatible Acer battery BT-T5007-001, rated at 4400mAh/65Wh and 14.8V, is installed with standard Acer battery configurations and specifications. If you are about to replace the old one or need a qualified backup, it is likely to be your best choice.
As to the users who have already taken use of the old battery for years, their Acer laptop computers won’t be so powerful as they used to be no matter they are Travelmate, Aspire or Extensa series. With time goes by, the internal contaminations increase and the performance come to be reduced to some extent. Under this circumstance, the best way is replacing the power supply according to OEM specifications instead of any higher value.
And brand new compatible Acer BT-T5007-001 laptop battery can supply enough output power to the motherboard and other parts of notebooks just as the old one can do at the early times.
As to those who need a backup, both last time and good electrochemical properties are necessary. 8-cell laptop battery has just met the demands of most Acer users.