My Huawei Y6 2 With a 5.5" HD LCD screen has a Kirin 620 CPU with 2gb RAM and 3000 mili ampear battery. The battery percentage dropped from 80% to 50% after 2 HOURS and 18 minutes of web browsing on chrome. Is this unusual? The phone is very new, bought it last month brand new. Please help. The connection I used was 3g (hspa +), and the signal was average.