If you are suffering from the battery status always saying estimating, there is a fix available at the following ppa:
https://launchpad.net/~brian-rogers/+archive/power
I installed it about 2 hours ago, and it seems to be working the way it should.
Fix availabe for bug # 629258
Archived thread 1606508 from Natty Narwhal Testing and Discussion (CLOSED). Markdown source: Natty_Narwhal_Testing_and_Discussion_(CLOSED)/thread_1606508_Fix_availabe_for_bug_#_629258.md