[Verizon HTC One (M7)] IceDragon59:
I burned through the battery the first day checking everything out, unlocking, mostly debloating, and whatnot, so I don't have any battery stats from then. Here are my battery stats for the following couple of days.

I turn off Mobile data when I'm not using it.

I generally turn Wi-Fi off when I'm not using it. I sometimes leave it on in the event that I'm going to receive a perpetual email from work and I'm sleeping or not near a computer, but that's the extent of extraneous use.

I turn off GPS when I'm not using it. I use it to avoid the inevitable traffic jams and whatnot.

I disabled background syncing of all apps except email.

I listen to music sporadically through the day, but you can't see that reflected in any meaningful way on the charts.

I turned brightness to ~30% because even in a well-lit room, that's all you need. If you're outside, you need more. I'm not outside a lot.

I send/receive a few hundred text messages a day with about 20 seconds of screen-on time to read a response and send a reply.

I spend 30 minutes to an hour speaking on the phone in an average day.

I play games on it for around an hour a day, spread out across the day.

I do light to moderate web-surfing.

My work schedule is hectic, as I'm on-call most days, therefore my sleep schedule is also hectic. You'll see that reflected slightly in the charts.

Anyway, here's the first day.

There's a bit of non-usage in there before I went to sleep and after I got up, and some short screen-on times it's not showing after I got up. Overall I'm not impressed. 43% after an included sleep session? Not good. I had to charge it before I went to work again because it wouldn't last. Hence the next record.

After a full charge, here's my second charge. There's a section of sleep in the middle.

Better, I suppose. 13 extra hours at only 22% battery drain. However, I hardly used Wi-Fi compared to the previous day. Still nothing compared to 3 - 3.5 days I was able to get with both my original Droid Incredible and Droid Incredible 4G LTE on the same usage with the stock battery. I understand a larger screen draws more power, but it's kinda ridiculous. Getting through a single day isn't a problem, but stretching it to two would be.

For the curious, I charged my phone after I got home last night, and then left it sitting there with Wi-Fi and Mobile Data off. It finished charging before I fell asleep, and I took it off the charger. Bright light in a dark room, that green LED. Anyway, four text messages and a missed call are the only usages of the phone during this time.

9 hours of standby is 4% of my battery. While getting 180 hours of standby isn't bad, that's barely over a week. My rarely-used OG Incredible that I have still powered up gets twice that in standby and still has over 20% battery left. I've read the HTC One has a standby battery leak, which may or may not be attributed to the Google Now mentioned previously in this thread.

Regardless, I would give this phone a 6/10 based on my previous phones' battery lives. Twice the number of higher-clocked processor cores and 2.25 times the overall screen size from the dual-core 720p Dinc 4G would draw more power, I get that, but the standby battery drain with less than two minutes of screen-on time is what's dropping my score. Years of HTC's engineering experience alongside Jellybean optimizations also should have taken care of power problems of previous phones.

Pending another round of testing, followed by another round with the Qualcomm battery saver app posted in the Apps sections, my plan is to charge my phone every night so I can keep it ready for the coming day.