The iPhone 7‘s battery is 1,960 mAh, exactly as rumored. On iPhone iPhone 6s, There was 1750 mAh battery. So it’s upgradation from apple in terms of battary. The figure comes from TENAA, the Chinese authority equivalent to the FCC in the US, so it’s as official as possible – but Apple still did’nt updated such information.
Moving on to the bigger iPhone 7 Plus it packs a 2,900 mAh battery, which is 150 mAh more than we saw inside its predecessor, the iPhone 6s Plus. Here we have a more modest 5% increase in capacity from the previous generation, not as big a step forward as we’ve seen for the iPhone 7.
(Also See Apple iPhone 7 vs Apple iPhone 7 Plus)