I have noticed my battery doesn't charge completely (Which is normal), but what worries me is that about 10% is drained quickly after charging.

For example, yesterday I put my phone to charge when it was about 10% battery (Around 11pm). I woke up this morning at 6am as usual. Before unplugging checked the battery and was 97%. Unplugged and went to do my stuff. About half an hour later, took the phone to check emails, battery was 90%. Browsed a little (about 15-20min) and it went to 85%.

Take in account I have my wifi disabled when not in use (I have the Wifi switcher), I don't use bluetooth, I have the brightness permanently in the second square, I don't have a data plan and I use the phone under GSM (no 3G here).

Does it happen to you too?

Apart from it, I have to charge battery every night. I consider I'm not a heavy-heavy user. I make/receive a couple of calls, send around 5sms, browse 20min in the mornings, maybe 30-1hr music and 30min games during the day, taking some notes or putting something under the calendar and 1-2hrs of games/browsing/IM in the evenings.