barnes and noble's Nook to Amazon's Kindle Ummm Yes we do

[Rainmaker]

Originally Posted by ApK

Not fridges, unless they have some sort of clock or other electronics.

Most electric/electronic devices use a power transformer. Power transformers suffer from 3 kind of power loss:

1. Due to the hysteresis cycle; which only depends withe the frecuency. (50 or 60 Hz depending on each country)
2. Due to the Joule effect (heat of metal conductors)
3. This one i can never remember the name, but it depends on the Magnetic field (usually denoted as B)

The 1st is passive; either functional or not, you get power loss.
The 2nd is active; you only get loss, if the system is functional
The 3rd can be either passive or active, and depends if the transformer is made from ferromagnetic material or not (diamagnetic and paramagnetic also). Ferromagnetic relate the B to H and M (Magnetic momentum).

And many, but not all, 'wall wart' transformers, like on chargers as you say, will have a bit of load when plugged in doing nothing.

This is what i was referring to.

[ApK]

Originally Posted by Rainmaker

Most electric/electronic devices use a power transformer. Power transformers suffer from 3 kind of power loss:

Every consumer fridge I've hooked an ammeter to over the past 20 years or so (assuming no wiring fault) read zero when the compressor and light were off. The transformer in the compressor is isolated by a mechanical relay when off, and the relays are controlled by a mechanical (presumably bimetallic) thermostat.
I'm sure there are exceptions in fridge designs that do leak, but no transformer will leak power if it's disconnected from the mains by the empty space of a mechanical switch in the off position, right?
For your #3, would that be inductive loss? Just a guess.
I love electrical stuff and I love my Kill-A-Watt meter, but this would be a discussion for another forum!

[DiapDealer]

I love electrical stuff

"Black on brass... save your ass," is the extent of my electrical knowledge.

[DJHARKAVY]

Originally Posted by ApK

Thankfully USB charging is getting more and more common. Most of what I need to charge now uses just the same USB charger, with a 99 cent mini/micro adapter on the end.

That's what I was thinking. I charge my phone nightly by plugging it into my computer when I am sleeping. I have a backup charger, which is just a battery with USB output in case I need to charge and my computer is low or unavailable.

If it can last two days (in case I forget to plug in one night) I am happy.

Of course, I have the JetBook Lite, so if my batteries run out, I just switch them.

[pastanley]

I knew there was a reason why I chose B&N over Amazon! Long live the battery!

[ApK]

Originally Posted by pastanley

"Long live the battery!"

That would be a good marketing slogan.

[Joykins]

Originally Posted by RainingLemur

That's a lot of page turns. Holy cats.

You'd think. But it's not unusual to have something like 900 page turns on a single book as one ebook "page" is usually bigger than a full screen.

that means I could read 24 books or so between charges.

[ApK]

Originally Posted by Joykins

one ebook "page" is usually bigger than a full screen.

What is an 'ebook page' if not 1 full screen?

[SleepyBob]

A "page" on the Nook is a certain amount of text. I think the amount was chosen to roughly mirror the amount of text on a typical printed page. Depending on your font size, it may take 3, 4, or more screens on the Nook to get the page counter to increment.

[ApK]

I guarantee that's not what they mean by 'page turns.' Ambiguity is yet another reason why I think page is an inappropriate term to use for ebook locations.

[SleepyBob]

Originally Posted by ApK

I guarantee that's not what they mean by 'page turns.' Ambiguity is yet another reason why I think page is an inappropriate term to use for ebook locations.

Of course. But Joykins' point was that you can't read a 25,000 page book with the 25,000 page turns. You can only read an 8,000 page book before recharging, because each page of a book takes 3-4 screens to get through.

[ApK]

Originally Posted by SleepyBob

Of course. But Joykins' point was that you can't read a 25,000 page book with the 25,000 page turns. You can only read an 8,000 page book before recharging, because each page of a book takes 3-4 screens to get through.

Hehe. That's some kind of light reading you're into.

[CRussel]

Honestly, I've had my K3 3G for 6 months now. I recharge it when I think about it, which isn't often! I've never had it run out of charge, and I read for 2-4 hours a day. Now with my K2, I did get a low battery warning a couple of times with the same reading level.

My point? K3 and new Nook are both at the level where there is a distinction without a difference. Until we get to the next level, where recharges are automatic from ambient light and we don't ever have to consciously recharge at all, this whole argument is specious, IMNSHO.

[ApK]

Originally Posted by CRussel

Until we get to the next level, where recharges are automatic from ambient light

Or other ambient radiation. Surely if all these power lines and cell phones are really giving us brain cancer, they can be harnessed to trickle charge a battery!

[anamardoll]

Originally Posted by DiapDealer

I'd prefer I never had to recharge, but until that day comes... any devices whose battery lasts longer than a week yet less than forever are on rather equal footing in my mind.

I usually recharge once a week. And read between 3-4 hours a day on my K2.

This. I, too, don't see the difference between 7 days and forever. Of course, I don't travel much...