I had the feeling that my Note's battery is not as strong as it should / used to be... so I started investigating how could I possibly test this.
Back in the day when I had the HTC Desire, there was an app that was specifically tailored for the Nexus One, that also worked on the Desire, which showed the actual mAh capacity left in your battery. So, you simply charged your battery to 100%, then fired up the app. It did work!
That apps is no longer available. Or any other app like it. What I did find, instead, was Nova Battery Tester.
So, I charged up my phone until it showed 100%. Then, I fired up Nova Battery Tester and waited for it to do its job. 50 minutes and some -45% less battery later, the results showed that my battery holds only ~1800 mAh of its claimed capacity.
Now... I would like to ask you, the community here, to do the test. Charge your phone fully, then fire up the app. The app requires that all networks are disabled, but you can just enable airplane mode, start test, then disable airplane mode and let the test finish.
So... if there's anyone willing to do this test, please share your results. Reason why I'm asking this : I want to see whether the app actually shows accurate results or not. I am sure my battery is a bit off, but still...