Hi, Using PlexTalk Pocket 1. The messages in the subject line are what I get when I check the battery status. The machine appears to be working ok otherwise. I also hear the power-connect/disconnect sounds when it sees the supplied power unit. I have re-set the PlexTalk a few times, and still get the ‘no battery installed’ and ‘battery level 0%’ messages. Once or twice, since I noticed these messages today, I have got the ‘battery charge complete’ message. But I’m now back to the ‘no battery installed’. (It certainly is ‘installed’ physically. (Off AC, as previously indicated, it’s ‘battery level 0%.) What does this mean? Is it indicative of a failing power supply, a failing battery, or that the battery has just run low and needs to re-charge? (I’m listening to music and/or other radio programmes recorded on it, mostly on AC.)