Just bought a 2017 9.7 standard WiFi-only iPad, iOS 11.3.1. I haven’t charged it in about three days, I’ve put just over five hours of usage into it between mostly Safari and Microsoft Word, and I still have 76% of my battery left as I type this. Solidly on track for at least double of what Apple advertises. Totally not complaining. Also wondering if others are getting as good of battery life. My old MacBook barely makes it 4 hours anymore.