I dunno, I get 16-20 hours off charger consistently and 4-5 hours of screen on/usage consistently. I also have zero signal issues and my phone is within 7-10dbm signal of my wifes iPhone 4. Last night I was also able to pull down 12Mbps on 4G with my signal fluctuating between 1 and 0 bars and -120dbm sitting in my bathroom. Just saying bro....