6S on 10.0.2 and I am verrrrrry hesitant to update due to the ongoing iOS battery drain issues. Want to go to 10.1.1 in case of a root exploit being talked about or possible jailbreak, but man I'm getting almost as good of battery life as I do on my SE on iOS9.
ETA phone was plugged in for about 5 minutes to do a quick backup on my computer. Wish we could show the bar graph/chart like android to show how little or long we charged to rule out any BS. But I was so impressed with the battery life I had to take a screenshot or two.