1400 HD  (250-3505)          Battery Information        Faxback Doc. # 1054

Use Battery Pack 25-3521.

Your Tandy 1400 HD comes with a custom battery pack that allows
portable operation of your system.

Using the battery, you can operate the Tandy 1400 HD two hours under the 
following conditions:

*   No options installed
*   Internal disk drives run no more than 10% of the operation time.
*   The battery is fully charged.

When the battery drains below normal operation requirements, the LOW BATT
indicator lights up and sounds two beeps. The computer will run for 
approximately 30 minutes longer. If the battery drains further, the indicator 
starts to blink, and five beeps sound. Plug in the AC adapter immediately. 
If you continue to use the battery, the computer's memory contents will be 
lost. If you can not charge the battery immediately, refrain from using the 
system.

The battery charging time depends on the amount that the battery has been 
exhausted. If the battery is almost fully discharged, it takes approximately 
15 hours to completely charge it with the system power turned off. With the 
system turned on, it takes longer to charge the battery.

The computer provides a Standby mode to avoid unnecessary consumption of 
battery power. The computer automatically enters the Standby mode if it 
receives no key input from you for a preset time. When you press any key, 
the Standby mode is released and the previous screen appears.

You can adjust the time that elapses before the unit enters the Standby mode. 
Press <CTRL><ALT><INS> to enter Setup mode. Press F1, and set the desired 
time length. You can select from one minute to three hours, 59 minutes, in 
one-minute increments.

While the computer is in the Standby state, the Standby indicator on the 
upper right of the keyboard is lit. Fully charged battery can retain the 
memory contents for approximately 11 hours. As in the normal operation mode,
the LOW BATT indicator lights when the battery can then retain the memory 
contents for approximately one more hour, we suggest that you plug in the 
AC adapter.

CAUTION: As in the normal operation mode, the LOW BATT indicator eventually 
begins blinking and sounds five beeps. If the battery becomes completely 
exhausted, the memory contents will be lost.

NOTES:

* Using an AC adapter other than the one supplied will cause the battery of  
  the system unit components to fail.
* When you do not intend to either use the system via the AC adapter or  
  recharge the batter, unplug the AC adapter from the wall outlet.

The average life of the battery pack is normally three years. However, if 
you leave the battery completely discharged or overcharge them, the battery 
wears down prematurely.

Replacing the Battery:

1. Turn the power switch off and unplug the AC adapter. Disconnect all 
peripherals.
2. Remove the battery cover on the left top of the unit.
3. Pull on the ribbon to lift our the battery pack.
4. Unlock the latch on the connector and detach the old battery pack.
5. Push the cable from the new battery pack onto the connector until you 
   hear a click.
6. Store the new battery pack in the compartment.

CAUTION: Before closing the battery cover, be sure that the battery cords 
are neatly stuffed between the battery pack and the rear panel, not routed 
over the battery pack.

7. Replace the battery cover.
8. Reconnect all the peripherals.