Sony PCG-F640 manual Using a Second Battery Pack, Notes on using the Infrared Port

VAIO Notebook User Guide

Infrared range

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Infrared port

approximately 15 degrees

Notes on using the Infrared Port

❑If the devices are too far apart or too close together, data transfer may be interrupted or there may be noise in the transmission. The active area of infrared transmission extends about 39 3/8 inches (1 meter) with a radius of approximately 15 degrees.

❑Covering the infrared ports with your hand or any other object will disrupt data transfer.

❑Avoid direct sunlight, fluorescent light, or flashing incandescent light near the infrared ports.

❑Disable infrared communication when you are not using it to conserve battery life.

Using a Second Battery Pack

You can purchase a second rechargeable battery pack. With two battery packs, you can extend the time that you use your computer with battery power. When using two battery packs, the battery pack you insert first charges first. The battery pack you insert second charges when the first battery pack is 85 percent full. You can monitor which battery pack is charging by observing the battery indicator lights.

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