HL Falbaum wrote:
Do you know that for sure or could it be some type of non-volatile memory?
That Dittle FSG71M has a built-in Lithium battery for it's memory which is
soldered into the PC board and looks like a capacitor. Dittle recommends
changing every 5-6 years. Not a job for amateurs.

Yes, the 302 has a lithium battery to provide backup for an internal
volatile memory (I believe the flight logs are store in flash memory,
however). It can't be replaced by the owner, as it requires opening the
case, which will break the security seal. In a few years I'm sure we'll
be hearing on r.a.s. just how long this battery lasts...

Marc