ORIGINAL: Most folks are unaware that LiPo and LiIon batteries only have an expected service life of 2-3 years.
What about if the battery is laying dormant?
I received a new 12Z for Xmas last year, used it a few times, then went back to my 9Z. I might try the 12Z again when I eventually go to 2.4, but for the foreseeable future the radio will be stored in its case. And of course, this radio has been discontinued by Futaba, and the OEM batteries are feloniously expensive.
Also, I wonder how durable (it seems to be mainly plastic) that battery latch us... Seeing as how you must remove the battery every time you charge it. I love the software in that radio... But the ergos and general feel of it leave me unimpressed.
.