Hi Kirsten: This message is regarding the battery. A battery will run about 20 hours before going flat. If the battery gets down to about 10"%, you have approximately 2 hours of battery usage. If your battery is critical, you have approximately 30 seconds so make sure you go back to Main Menu so no data is lost.
Discharge your battery every so often. You should calibrate every two to three months. It doesn't help the battery, but it keeps the gauge accurate. 1. Fully charge up the battery. 2. Unplug AC Adapter. 3. Press Space with O (Function with O), then Space with dots 2-4 (Read with I). 4. Press the letter From. You will see, "I'm talking until my battery goes flat. This repetition is enough to drive me crazy. How about you? 5. If you are wanting to exercise your Braille Display, just press It. When your machine shuts off, plug your AC Adapter back in.
