Another thing to consider.....
Many times the battery life is a "guess" based upon the current usage at that particular time. IOW, if you are in a poor coverage area, the phone has to turn up the gain on the antenna to achieve reasonable service. Your battery remaining is based upon what is going on with the phone AT THAT MOMENT.
To put it a different way.....
You know the trip computer on your car....if you floor the accelerator you will notice that your instantaneous MPG will be less than 5mpg. But when you lift off the accelerator, then it reads something more realistic. That battery icon is similar and it represents your battery life under those INSTANTANEOUS circumstances/usage. This is why you will see the battery life jump around a bit.
With all that said, I am still not seeing great battery life out of this thing.
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