If you’re reading this, you know what I mean. The power manager applet in Ubuntu never estimates your remaining battery time, and forces you to dig deep into the battery properties to find its current percentage. According to the maintainers of the applet, the problem is not a bug, rather a problem with the ACPI in the computer. I eventually found that a patched version was released and can be used until the problem is resolved.

You can download it here: upower-i386