The problem is the same as here:
The icon does not change when the power cord is plugged in or unplugged (the icon remains a battery if that was the power source on boot but won't change if I plug in the power adaptor and visa-verse).
The battery indicator does not give me a low battery warning or alert (ubuntu just shuts down with no onscreen warnings).
- I use Ubuntu 12.04 LTS, 64 Bit
acpi -breturns "Battery 0: Unknown, 95%"