This Genuine Fujitsu brand laptop battery provides a secondary battery by inserting it in place of your CD drive. This battery on it's own will provide up to 4 hours. In combination with the main battery you can achieve up to 9 hours of battery run time. If you are looking for the main battery for the T902 Fujitsu tablet you can find it here:

This brand new Fujitsu laptop battery features lithium-ion cells. Li-ion battery technology provides longer run times with less weight. In addition, Li-ion batteries are not subject to the memory effect common with older battery technology. This laptop battery replacement is 100% compatible with the original battery specifications and is individually tested and backed by a 1 year warranty.

You can expect about 4 hours of additional run time with this computer battery when new, depending on your energy use.

This battery replaces the Fujitsu Lifebook T902 series tablet batteries.