Interesting topic at the last club meeting. Most IC-7300 owners were reporting that their clock batteries had died - permanently - and are not field replaceable. Apparently these little "rechargable" wonders fail if the radio is not powered from the 12V supply for a while and they discharge too deeply. Soldered in-place and difficult to replace, apparently. Did not cause other problems, but still a nagging defect. Something to be aware of if you are buying a used one.