I leave for work at 7:00 AM with a full battery. I use a company landline to communicate with our customers so I'm not on my iPhone that often. Only on smoke breaks and texting other employees regarding business manners. I only work part time and am home usually by 12am-1pm. When I get home my battery life is 5%-20%. If I take a nap and charge it while doing so, I can usually last the rest of the day (not evening) without another charge. If I don't charge my phone during my hour nap, I'm charging on and off, whenever I can, for the rest of the day. I have an iPhone 5 and I'm really quite surprised how much of a far cry the battery life is compared to iOS 6, as well as charging speed. Mind you it's only beta, I feel like this is way below average mobile phone battery efficiency.