All this discussion about the battery life made me curious and I tested my own new iPad.
I completely emptied the battery last week, it ran down from 100% and was completely empty last Sunday at 11.30 am. I then recharged it to 100%, this took approximately 5 hrs and 45 mins until 05.15 pm.
Then I used the following setting:
Brightness set to approximately 60 % (just a little to the right of the sun symbol, so it could have been 55 %, could also have been 65 %), automatic brightness adjustment enabled, when unused, the iPad remained in standby-mode (never completely turned off). Whenever in use, the iPad was on WiFi, never on mobile internet. Whenever I used the iPad for the last time, before going to bed, I set it into "airplane mode".
I was making sure that I was using the iPad "normally", as I would, if I didn't run this "test".
My day-to-day iPad tasks include the following: browsing the internet, reading and writing emails, watching videos on youtube, listening to music via iTunes Match, talking on Skype and writing messages with IM+. Furthermore, I am regularly browsing PubMed (with PubMed on Tap), reading PDF (mostly articles from PubMed or the Scientific American) and reading word documents in Pages.
I am also regularly using the Wikipanion+ app to do interesting read-ups on Wikipedia. And on a few occasions I edit one or the other photograph in iPhoto.
So all in all, these are pretty moderate tasks as compared to what other people here are doing.
During my "test period" I did all of those things, the emphasis was probably on surfing the web and emails, I only did the odd Skype call and just a little of photo editing. However, all of the tasks above were performed over the course of the week.
So what did I get: I started to drain the battery beginning from 100% last Sunday evening at around 05.15 pm and I finished draining it at 0% today, on Saturday at around 09.15 pm. I made exact notes of all the usage times. And I mean really the times that the iPad was actually in use, which means I was performing tasks on it.
I came out at a whopping 753 mins or in other words 12.55 hrs or 12 hrs and 33 mins of use. The rest was standby time, if you do the math 111 hrs and 27 mins, since I never completely switched the iPad off.
So you can always argue that I am not playing 3D games or watch HD movies. This would probably significantly reduce my usage time. Also setting the display brightness to 100%.
But for the way I am using the iPad, it's one hell of a battery life.
As I said, I didn't do it, because I was worried, I would be "cheated" of an hour of battery life. I was just interested due to all these discussions here.
Best regards,
Sebastian
