"BruceGreeff" wrote in message
...
All LX instruments do this...

On 2012/05/18 2:49 AM, Thomas McMullen wrote:
If you have a Colibri II make sure that the battery does not fully
discharge. Doing so will break the seal and it will need to be
returned for resealing. If you plan to store it for a period of time
make sure you check it on a schedule to ensure that the battery still
has a charge. The manual cautions you to not let the battery discharge
but fails to tell you the consequences of doing so.

--
Bruce Greeff
T59D #1771

_________________
Hi,

That is not true. The Colibri and LX 4000, 5000, 7000, 8000, 9000, etc. all
have a "backup battery" that is used to retain the unit's memory. The
backup battery is not used to power the unit. The backup batteries last
about 5 years.

If I'm understanding the posts about the LX Navigation Colibri II correctly,
it is the main battery (the one used to power the unit in flight) that is
used to keep the unit's memory and security seal intact - sort of like an
iPAQ's main battery. When the main battery dies, the security seal and
flight logs and settings are lost. If that is true, it is a bummer.

Someone made a recent post in this thread asking if the LXNAV Nano has the
same issue. I'm pretty sure the answer is no. I just removed the main
battery from my Nano and replaced it and the unit's security seal is still
valid. The main battery (used to power the unit in flight) can be changed
without affecting the security. The battery compartment is not the secure
part of the unit. After opening the unit and removing the battery I saw that
the main part of the unit (the part other than the battery compartment) has
a security seal. It is my assumption that there is a "10 year" backup
battery for retaining the unit's security seal and settings in that secure
compartment.

Best Regards,

Paul Remde