AlanNJ wrote:
bobstro wrote:After a few days testing, I'm pleased to report that battery consumption in standby with wifi off is roughly 0.25% per hour (or 1% over 4 hours). From everything I've read, that's on par with non-rooted.
At 5.75% per day for standby, plus an hour at 4%, looks like I'm good for 10 days of "typical" 1 hour reading and online usage. Not exactly 2 months, but I didn't expect that to be realistic. I'm just delighted to have a device I can take on the road and use for a week of casual reading, and checking email when I must.
Although I haven't done any specific testing I can tell you that with wi-fi off on my non-rooted NST I can read well over 1 hour per day and not need to charge after 10 days. My charge seems to last closer to at least a month or more as I can't even recall when I last specifically charged the device.
I haven't done any specific testing either, but bobstro's calculations seem off compared to my usage also. I've read four books on my nook since my last charge and I'm a slow reader. I can say with confidence that I've spent more than 7 hours a week reading on my nook, and I haven't charged my nook since the first week of January. Granted, it's due for a charge now, but that's still a heck of a lot more time on my nook than 10 days (and 10 hours of reading) between charges.
FWIW, I generally charge monthly, whether my nook needs it or not. I've never gotten only 10 days between charges, even when reading an entire 6-book series back-to-back.
Bobstro - are you sure your battery is properly calibrated?
Sun_Cat wrote:
bobstro wrote:
The NST charges so quickly, it's hard to run it down to calibrate the battery. Even in the few minutes I connect it via USB to sideload newspapers and such, it nearly tops off.
True. If you do any significant amount of regular sideloading, this keeps happening. It's sometimes made me wish that there was a way to turn off charging while in USB mode.
As an alternative -- since it charges fastest when on a powered USB hub, next fastest on direct plugin to a USB port, slowest on a non-powered hub shared with other power-hungry devices -- always use that last scenario when sideloading. It will at least slow down the charging.
Why is this bad? I mean, yeah, if you're trying to pin down how long your battery lasts it's a pain, but otherwise, I don't see how this is an issue.
Sun_Cat wrote:It's only an issue because if you keep topping up the battery after small-percentage discharges, you may not be getting the maximum lifetime usage out of it. See this post for a chart that seems to indicate you'll get almost twice as much total use from your battery if you let it discharge by 50% before recharging compared to only 10%.
I think at some point we did the math on the number of charges the standard Li-ion battery is good for, and it worked out that even with incidental top offs the battery would last somewhere over 10 years. I'll see if I can't find that thread.
ETA:
Okay, can't find that thread, but I did take a look at the thread that you linked to, and here's my math:
I usually charge my once a month (every 4.5 weeks) and it's usually at about 30% when I charge it. So let's say that I'm a slightly more avid reader than I seem to be, and say that I get to 25% on four weeks even. By that logic I'd be at 50%, the recharging sweet spot, every 3 weeks.
So 3 weeks, times the 1500 cycles that the battery should be good for, means the battery should be good for 4,500 weeks, or 86 years.
Now, say I'm a top-off person and I charge when I reach 10%, every 4-5 days (or say I connect to sideload every 4-5 days). My battery should be good for 4700 cycles according to that chart, and that works out to almost 58 years.
So... I don't see the top-offs as being an issue, as I'm sure 58 years from now I'll have moved on to a newer device. 
