My friend reported a problem with his Curve 8520.
I have a Curve 8520 as a backup at home and the problem was that by the end of the day his phone was off...
Now he does nothing major on his phone just couple of phone calls and text messages.
Now i tested my Curve and was seeing the same problem until i calibrated my battery...
The way you fo==do that is you deplete your phone battery to 20% (THis works on all the phones not only blackberry) and then you charge it immediately doing this once in a month for 3-4 months should take care of your battery...
The only problem in Blackberry is that once your Battery reaches 5% your Radio turns off and as far as I know only blackberries do this.
For eg. If you are in a urgent need to call someone and your phone (blackberry) runs out of battery what will you do???
Good question don't you think?
If you have an answer for it reply rite here in a comment