LiveScribe Pulse Pen Borked

I’d nearly forgotten I had one of these. If you’re not familiar with these amazing pens go take a look at their website: LiveScribe.com However, since I’d forgotten it for several months, it’s battery has naturally drained. This wouldn’t be so bad, except that it’s now refusing to accept a charge. So I started some testing:

1. While undocked it refuses to respond to input: It won’t power on; pressing and holding the power button for 10+ seconds to get it to hard reset doesn’t do anything; it doesn’t respond to being touched to a NavPlus icon.
2. Upon docking into the cradle it displays the LiveScribe logo, then displays “Starting…” followed by showing a screen containing a battery symbol with an exclamation mark inside, with a plug symbol and a flashing lightning symbol beside it.
3. It will retain the above screen for between 5 and 15 minutes, I’m not exactly sure - didn’t have the patience to time it, when it switches to a screen showing the following text: “Charging error”

While on the dock I can power the unit off and on, however it doesn’t connect to my LiveScribe Desktop installation, so I can’t verify its firmware version. I know I updated it a while ago, so I suspect that it is version 2.4.3, but I’m not sure. It may be as old as version 2.2, but not any older. I’ve contacted LiveScribe support, as I can’t find any hint of anyone else having ever seen the “Charge error” screen, even after a good long Google search.