This high capacity 9-cell PA3479 battery for Toshiba P100 and other models is convenient to have on hand for a long flight or time out in the field away from a power outlet. Its rated at 11.1V and 7200mAh and uses the latest in lithium-ion technology for optimal performance and long life. You can increase the overall lifespan of this battery by recharging when its at 20-30 percent of its full capacity, rather than discharging fully. Tips for lengthening the run time include closing down applications when not in use, ejecting any CDs and DVDs from the drive and disconnecting any peripherals. You should also make use of your computers power saving features, which among other things, dims the screen during periods of inactivity. This compatible Toshiba P100 laptop battery is built to the manufacturers specifications to perform exactly like the original. Buy it for less at USBPhoneWorld.com.