Important Information about the Infrared Body Pack for the Older Pathfinder
Pathfinder: IR Body Pack Information
IR Body Pack
When the headpointing body pack battery is low, a red LED on top of the body pack lights to warn you to plug in the headpointing battery charger.
When you first receive your sensor and Body Pack, charge the batteries overnight.
Plug the small end of the charger (BCPS-1) that came with the headpointer into the battery charger connector on the side of the Body Pack. Plug the other end of the charger into a working A/C wall outlet. When the charger is plugged in, the red LED on the Body Pack lights until you unplug the charger. The next morning, unplug the charger from the Body Pack. Use the headpointer until the red LED on the Body Pack comes on, indicating that the batteries are low. This should take 3-4 days, depending on how much you use the unit. When the light comes on, recharge the unit. If it took 4 days before the red light came on, re-charge the batteries once every 3 days. If the low battery light came on after 3 days, re-charge the battery once every 2 days. This re-charging schedule means you should be charging the batteries before the red light comes on.
Once a month, allow the batteries to go completely dead
This means you should use the unit until it no longer works. When the batteries are dead, plug in the charger and charge the batteries overnight (8-10 hours). If you use the headpointer while the battery charger is plugged in, the batteries will not charge. Plan not to use the unit while it is charging. If you follow these guidelines the batteries should last for at least 2 years.
Replacing the Batteries
If the batteries quit working completely and will not re-charge, you will have to replace them. Replace it with a Nickel Metal Hydride 9 Volt battery. If you are not sure if you are purchasing the correct battery, take the old battery with you to Radio Shack for assistance. You cannot use alkaline or NiCad batteries in the Body Pack. 
IR Headpointing: Color Pointer
Summary: You can change the color of the headpointer if you do not like the default color.
When you use Headpointing you will see a pointer in the shape of a hand on your display. The default color for the hand is gray. If this is hard for you to see, or if you would just like a different color, select the Pointer color option in the menu. Activate the option to see the different colors. When you see the color you want to use, activate the OK key.