I'm happy with the battery life of my phone, I get several days of use between charges. The problem is that the battery indicator is too unreliable. The charge might drop from 50% to 0% overnight without the phone being used.

I've contacted BQ support and they told me to calibrate my battery. I'm going to do as they say, however I have a feeling that won't do the trick. I used to have an Archos Android phone in the past with the same problem that never recovered after months of full charge/recharge cycles...

Has anybody experienced similar issues?