I had a few hundred frequencies stored in the memory of my Yaesu VX-2R.
The battery pack died and remained that way for probably a month or
two. Now all of my memory data is gone. Apparently this is volatile
memory.

I store this HT in the refrigerator with a battery installed. This is
where I store all of my batteries. Every six months or so I check the
charge level on all of the batteries.

Whatsmore, it seems that this HT pulls a small amount of current from
the 1 Ah Li-ion battery even when shut off. I say this because none of
my other Li-ion batteries in the refrigerator were anywhere near dead.
The VX-2R battery was dead as a doorknob, so I replaced it.

My queston is, what sort of internal battery maintains the VX-2R memory?
And how long will it last without the main battery? Might my internal
battery now be dead? If the internal battery is also Li-ion then it's
probably best to not store it in the refrigerator if there is a small load.

I'd hate to reprogram this thing only to lose all the data once again.

Thanks for your help.

Bruce AF8F