2800 HD (250-3550)          Battery Information         Faxback Doc. # 1845

Battery Part Number:     25-3556   (available from Tandy Consumer Mail)

┌───────────────────────────────────────┐
│Connecting and Installing the Battery: │
└───────────────────────────────────────┘

There is only one way to properly connect the battery: connect it so that
the latch on the battery connector faces upward.

To install the battery:

1. Carefully remove the battery compartment lid by pressing the locking 
   tabs and sliding the lid off the computer.
2. Hold the battery so that the electrical leads point downward.
3. Connect the battery so that the latch on the battery connector faces
   upward.
4. Lower the end of the battery with the wire leads into the computer.
5. Slide the battery forward so that the wires are stored properly, and 
   then lower the rest of the battery into the computer.
6. Replace the battery compartment lid.

Battery Removal:

CAUTION: Removing power from the computer (turning off the computer or
         disconnecting the battery when the computer is not plugged in) 
         will delete the contents of the computer's memory. Be careful when
         removing the battery.

1. Carefully remove the battery compartment lid by pressing the locking tabs
   and sliding the lid off the computer.
2. Remove the battery from the computer by lifting it out by the wire lead
   end.
3. Press the latch on the battery connector, and disconnect the battery
   connector.

CAUTION: Improper handling of this lead acid battery can cause a fire, 
         explosion, or severe burns. Never short circuit, disassemble, or
         heat the battery. Never solder directly to the battery or expose it
         to water.

┌──────────────────────┐
│Charging the Battery: │
└──────────────────────┘

CAUTION: - Charge the battery for 12 hours inside the computer before using
           the battery for the first time. If you do not fully charge the
           battery, its charging potential will be weakened.

If you run the computer from battery power, the computer will have up to 2 
hours of operating time, depending on the operating conditions. When the 
battery drains below the power requirements for normal operation, the 
Power/Low Battery indicator flashes. At this time, either connect the AC 
adapter and charge the battery or replace the drained battery with one that 
has been fully charged in the external battery charger.

If the battery drains further, the indicator starts blinking slowly.
Operating the computer during this warning phase will cause the loss of the
computer's memory contents.

When charging the batteries, keep the following information in mind:

° You can charge the battery either inside or outside the computer, as 
  described later, with the computer on or off.
° Always keep the battery as charged as possible. If the battery is left 
  uncharged for long periods of time, it will lose its charging potential.
  Be sure that the battery is fully charged at least once every two months.
° Always plug the AC adapter into the computer before plugging it into the 
  wall.
° Using an AC adapter other than the one supplied will cause the battery or 
  the computer's components to fail.
° When not using the AC adapter, unplug it from the wall.

Internal Charging:

To charge the battery without removing it from the computer, simply plug the
AC adapter into the computer and then into a standard AC wall outlet.

Recharging the battery takes approximately 10 hours if the battery's power
is low. It takes longer if the computer is operating while the battery
charges.

External Charging:

To use the external battery charger, simply disconnect the battery from the 
computer and then connect it to the charger. Plug the AC adapter into the 
charger and then into a standard AC wall outlet.

If you obtain a replacement battery, you can charge one battery with the 
charger while using the other in the computer.

Recharging the battery in the charger takes approximately 10-12 hours if the
battery's power is low.

┌──────────────────────────────────────┐
│To switch batteries during operation: │
└──────────────────────────────────────┘

1. Open the battery compartment.
2. Connect the replacement battery to the unused battery connector inside
   the computer.
3. Unplug and remove the original battery from the computer. Place this 
   battery into the battery charger.

CAUTION: Do not leave both batteries connected for an extended period of
         time.

4. Put the replacement battery into the computer, and replace the battery 
   compartment lid.

(rjs-06/10/93)