I wasn't paying much attention to this (Back-up battery)
until I loaded a site into my model 20, took the little
black box out to my sailplane, turned it on and it
said, 'No turn points loaded'. What's this? I just
did that? Took it back in the house, powered up the
box and loaded them again. Back out to the ship and
(you guessed it)------no turnpoints loaded. Ah Ha,
bet that little back-up battery (the one that was 9
years old) has taken a dump. The replacement battery
was stamped 'Lithium'. I have decided to change them
every 5 years.
JJ



At 22:00 01 January 2005, Marc Ramsey wrote:
Eric Greenwell wrote:
The 302 manual makes no mention of an internal battery,
so I assume
there is no need to change it. I don't know how they
handle trashing the
security seal if the box is opened.

There is an internal long-life lithium battery, it
just doesn't need to
be replaced on a routine basis. Eventually, I suspect,
it will need
replacement (perhaps after 10 years or so), in which
case the 302 will
need to be returned to Cambridge or one of its agents...

Marc