I had a 12 hour battery life and 5 hour usage on my iPhone 5. After my first full charge, I got 48 hours lifetime and 12 hour usage on my plus. It really is amazing. It's partly why I loved my iPhone 5 so much because it demolished my Android, Windows and BlackBerry devices in battery life. Here, I am on this thing constantly(more that I should, I feel guilty >_>) and I expect things to get even better once I get back to normal usage. It also took about 2 hours to charge my 6 Plus back to full. I love this thing so much. XDDDD