Thank you Don for this excellent discussion.
----- Original Message -----
From: "Don Bishop" <[EMAIL PROTECTED]>
To: "Braillenote List" <[email protected]>
Sent: Tuesday, January 31, 2006 10:34 AM
Subject: Re: [Braillenote] battery is critical
If you want to calibrate your battery gauge, do the following. Note that
the battery itself is really not effected, but rather the gauge within the
MPower which
determines when battery warning messages should be sent out and also
tracks the percentage of battery charge. It helps to put the software
mechanism in
the MPower in sync with what is actually happening related to the physical
battery charge.
First, use your MPower until your battery registers below 80 percent.
This will insure that the calibration process starts with the unit
charging at a full charger
rate rather than trickle charging. Actually, you can do this if the
battery is around 90 percent, but 80 percent gives a bit more chance to be
sure the battery
is charging. If you start the process with too high a percentage of
battery capacity, the initial charge part of the process can take nearly
forever.
2. To actually start the calibration process, from the main menu, press
space with o on the bt or function with o on the qt to get into the
options menu.
3. Enter support mode with space with i on the bt or read with i on the
qt.
4. Make sure your ac adapter is plugged into an electrical outlet
and into the MPower.
5. Press dots 1 2 3 5 on the bt or the letter r on the qt to start the
process.
You should see a message on your braille display which says " battery
calibration I'm charging up my battery!" And there may be more to this
message but
this is the gist of it.
Once the battery is fully charged the discharge cycle will begin. Speech
will be switched on and you hear the message "I'm talking until my battery
goes
flat", etc. It's a good idea to put the MPower somewhere so this repeated
message won't bother you as it will continue for many hours. A good way
to deal
with this is to turn up the MPower volume to 32 and then plug earphones
into the earphone jack of the unit. This will also help to speed up the
discharge
process. You may be able to speed it up further by playing the repeated
message through the speaker but it may be at the price of your sanity and
the good
will of your family.
Once the battery is fully dicsharged, a second charging sequence will
start. There will be no continuous speech during this charge.
Once the final charging is complete, you should see a message saying that
the calibration is complete.
You're done!
Don't interrupt this process if at all possible as it will just slow
things down and may require you to do it all over again. You won't hurt
anything by interrupting
it except that you may not receive the calibration results you want.
The entire process can take around 18 hours, sometimes more sometimes less
depending on the particular unit and battery in question.
You really should only have to do this very occasionally.
Once the battery calibration is complete, just exit back to the main menu
and continue using your MPower as usual.
Don
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