Product DescriptionVST Technologies Inc., is a company specializing in the design of portable peripherals for laptop and desktop computers. The VST product line includes FireWire Hard Drives, USB Floppy Drives, expansion bay storage devices, such as the Zip100 drive for select IBM, Fujitsu and Apple laptops, SuperDisk drives for select Apple and IBM laptops, as well as hard drives, power adapters, chargers and batteries for the Macintosh PowerBook series.This is a Lithium Ion (Li-Ion) battery for Powerbook 3400. These 32 Watt-hour batteries deliver runtimes between 2.5 and 3.5 hours and are not subject to memory effect. Li-Ion batteries are the highest engergy density to weight ratio battery available to Powerbook users.