Originally Posted by
JohnBuckner
Yes I am afraid those as noted they cannot be upgraded but also as noted there is no reason not to use them as they are narrowband so then the only question mark now will be the batteries.
John
That is the reason I suggested getting the system checked out. I've seen battery packs go bad in a year and others that were still good after not being used for several years. Since you just don't know, it's better to get everything checked out rather than take a chance in my opinion