Sorry I'm just seeing this now, but let's run with it.
Originally Posted by Trash Can
You're thought process is not flawed, there are variables that determine what constitutes a full discharge. For one device manufacturer, a 0% of capacity may be at 3.2V, whereas another may peg it at 3.0. Obviously 3V is much closer to the "protection" Voltage of between 2.2V & 2.9V, so if one manufacturer says run it down, and another one says don't, the difference could be the cutoff voltage.
Second, all Lithium batteries are not created equal. Lithium Ion Polymer Pouch Packs (in the RAZRs), are a different breed than all other LIPO batteries and are both higher in energy density and also come with their own unique characteristics.
Another important issue is that with the LIPO Pouch Cells, the phone itself contains the protection circuits and charging circuits, so each phone manufacturer can tweak the various levels for things such as running voltages, cutoffs for charging and discharging, and the protection level. Apple may actually have their discharge level cutoff at a higher voltage than Motorola, and as a result there is a bigger cushion between 0% and the potential cutoff protection voltages.
Also I checked the page you linked to and saw the quote you referred to, but I did also find this http://www.apple.com/batteries/, and it says in one section:
"You can also recharge a lithium-ion polymer battery whenever convenient, without the full charge or discharge cycle necessary to keep nickel-based batteries at peak performance. (Over time, crystals build up in nickel-based batteries and prevent you from charging them completely, necessitating an inconvenient full discharge.)"
This is in direct contrast to the quote you showed. Perhaps the issue here is what they call "completely running it down". In the RAZR, completely running it down is to 15% (10% with Jelly Bean), NOT to 0%. When the phone tells you it's time to plug in (the "Low battery warning at 15% - 10% with Jelly Bean), then you can reasonably conclude it's time to plug in.
The same holds true for the iPhones. What people do is misinterpret that information to mean 0%. If Apple OR Motorola wanted you to discharge to 0%, they'd say it this way; "use your phone until it shows 0% on the display". If they wanted you to use it until it powered itself off with a completely deep-discharged battery, they'd say; "run your phone until the phone shuts off on its own". that's NOT what it says.
If your car manufacturer told you to run the car till it was empty once a month, how many people do you think would actually do it? NONE? You'd have to drive on "E" for many miles, and then you would also have to carry with you a gas can full of gas so you could start the car again and drive it to the nearest station after it stalled at completely empty. I really don't think that either Apple OR Motorola meant "completely discharged" when they say "completely run it down".
In fact, the same thing Apple is saying is what I've been saying too...charge to 100%, use to 15%, charge to 100%, or in layman's terms, "Charge to 100%, then completely run it down, then charge to 100% and use normally". This is a meter calibration cycle. Nothing new here folks, move along.
Sent from my DROID RAZR using Tapatalk 2