Apple promised improved battery life for its new iPhone 5s and 5c, but other than endurance times for a few use cases, the company gave little info on the battery itself. Luckily, it's FCC's job to certify such aspects of a mobile device so now we have the actual battery capacity. The iPhone 5, 5s and 5c batteries all work at 3.8V, but differ in battery size. The iPhone 5 had a 5.45Wh battery which works out to 1,440mAh.
GSM Arena , The iPhone 5c and 5s have bigger batteries than the iPhone 5, The iPhone 5c and 5s have bigger batteries than the iPhone 5
