On Tuesday, FreshBattery announced a new Legacy line of batteries. The units are designed to provide batteries for laptop models that have been discontinued for three to five years, including older PowerBooks and iBooks.

According to Macworld News, the company claims that the batteries are designed to meet or exceed the original manufacturer's specifications. In the case of a Legacy battery for an original PowerBook G4, FreshBattery has substituted the original 3600 mAH cells with 4400 mAH cells, resulting in a battery that adds an additional 40 minutes of run time between charges.

FreshBattery currently produces a battery range that covers the original "Clamshell" iBook G3s and goes back as far as the Wall Street and Pismo-era G3 PowerBooks. The Legacy battery line is currently priced under US$100 and available immediately.

If you have any thoughts or feedback about this or your laptop's battery, let us know in the comments or forums.